Again, your ONLY guarantee of tour quality vs cost is the thoroughness of your understanding & evaluation of the 27 Tour Factors I have offered you.

Only you can value a tour's quality level; only you know how much you are willing to pay.
Your human brain superbly amasses this kind of info and reduces it down to a simple decision. 

So trust in yourself.

Usually, as in most purchases, the higher the cost, the greater the quality, but CAUTION, sometimes lower price merely disguises lower quality.    Beware!

A. Quick Look: (Please read closely because terms are subtly confusing)
    1. Inclusive (all inclusive): Covers most or all expenses; offers simplicity & convenience, but little ‘free time’ flexibility. 
    2. Partial Inclusive: Some expenses, but not all covered so guest must control their budget AND do their own ‘free time’ planning
    3. All Exclusive (All-Inclusive): Basics covered is included for a completely worry-free trip, but with higher costs and less flexibility & choice.

B. A Deeper Look:
    1. “Inclusive (All-inclusive)”  (both mean the same)
          Definition: These tours cover almost all expenses at a single price for a worry-free trip
               CAUTION: Usually, as in most purchases, the higher the cost, the greater the quality, but,
                     sometimes lower price merely disguises lower quality.
          BEST deal: if you eat, drink, & participate a lot. 

        PROs: 
   1. Price: Single upfront price. ‘Good deal’, if take full use.  No ‘final surprise bill'!
   2. Price/Quality Options: Many deeply curated levels of quality & price. 
       a. Carol Walton’s Expedition flies high-rollers between African safari sites. 
       b. Some specialty tours (not Carol’s) can cost $100, 000.
   3. Research, planning & logistics: done for you.
   4. Transportation: included, maybe transfers to/from airports
   5. Lodging: Included
   6. Meals: often all meals, maybe snacks beverages & alcohol)
   8. Activities: included a wide range of activities, excursions, or fun.
   9. All planning: …. site, activity & logistics done for you.
   10. Extras: maybe includes; tips, hotel & local taxes, service charges,
         to/from airport, transfers, food, snacks, alcohol (premium brands, 24/7);
         wifi & cell on bus, hotel taxes,
   11. Non-tour expenses: maybe Local Entry & Departure Tax
         (Costa Rica, cash only), on-arrival visas, Currency exchange & ATM Fees.
   12. Worry-free: because rigid, but comprehensive.
   13. Predictable cost budgeting: all costs known upfront & included. 
   14. Less cash to carry: supposedly because initial price covers all, but …..

TIP: Be wise. Always carry cash or cc/dc; you just never know.

        CONs: 
    1. Near-zero flexibility: rigid site/activities/meal schedules, & little ‘free time’.
    2. Less value for $: if you don't use all the included services.

    2. Partially Inclusive:
Definition: Includes some, but not all, expenses in a single package price.
        It Is the middle ground between ‘inclusive (all inclusive)’ & ‘exclusive’ tours including some, but not all expenses in the package price. but, most importantly, probably some 'free-time' opportunities.      

     So guest must control their budget AND do their own ‘"free-time"’ planning.    
        PROs:
    1. Price: low initial cost, but often budget-busting add-ons; must-budget extras.
    2. Better Value for Money: particularly if you highly value “Free Time” options.
    3. Flexible: some “free time” options: local walkabout, meals, local Excursions.
    4. Transportation: maybe to/from airport transfers. 
    6. Lodging: for specified tour nights
    7. Meals: Varies: some or none.  You must ask in advance.
    8. Activities: a few Tier 1 & 2 sites, but maybe not free optional activities.
    9. Guides: guided tours for the entire tour.
    10. Entry fees: included for some attractions/activities, but not all.
    11. ’Free time’ options: some afternoons & evenings.

Rick Steves Tours seems to go out of their way to ensure you have all the pre-booking info you need. https://www.ricksteves.com/travel-tips/trip-planning/comparing-tours

      CONs: 
    1. ‘Free time’ opportunities: require fun pre-trip planning, & booking.
    2. Extra ‘free-time’ budgeting: excursions, restaurants, Uber etc.
    3. Flights: often not included, unless specified: “air-inclusive"
    4. Meals: most not covered, but varies.  Please ask.
    5. Personal Expenses: Not covered: souvenirs, alcohol, tips, bottled water.
    6. Optional Excursions: NOT covered, often overpriced; may book locally.
    7. Contract & Promo’s Fine Print: Read to avoid surprises & dissatisfaction.
    8. Travel Insurance: I always bought.

    3. Exclusive: usually ONLY includes basic published tour features most basic, least expensive initial cost with largest % of 'free-time' 
                                  (Not to be confused with ‘all-inclusive')

CAUTION: Term "exclusive" often duplicitously used to suggest ‘exclusivity’ i.e high quality, but not necessarily so.

        PROS: 
    1. BEST: plentiful "free-time" for self-guided walkabout options: local's
          restaurants, intimate neighborhood walkabouts
    2. Cost: least costly, …. if you avoid costly add-on services, etc.
    3. Tour Published Basics ONLY: lodging, meals, sites/activities
    4. Transportation: unlikely to/from airport transfers
    5. Food & Lodging: minimal basics
    8. Attraction Entry Fees: yes, for most package-specific attractions 
    9. Perks: limited, if any: snacks, beverages.
    10. Internet ‘"free-time"’ research & planning: “Believe it or not …”,
          can be exciting [pplk’ 3 trips in one’ idea].
    11. Budget ‘"free-time"’ additional costs, if any: local excursions, dinners. etc.          
        NOTE: Your self-guided walking tours are free & worthwhile.  [jlk "free-time']

CONs: 
    1. Cost: may exceed budget, if too many add-on services. Restraint. �
    2. "free-time"’s options: may add cost, unless budgeted beforehand. 
    3. Attraction Entry Fees: for some package attractions. Ask?  
    4. Hidden extra expenses: know what is not included. Ask !!!
    5. Optional’ excursions: not covered, often overpriced
    6. Food & Drink: usually NOT covered: alcohol,
    7. Lodging services: not included; usually expensive: laundry, pressing.
    8. Single supplement fee: single person's extra lodging fee
    9. Fine Print: ALWAYS check fine print, or ask about hidden costs.
    10. Guest perks: some included, but, others are extra: tips, spa
          treatments, high-end optional activities &luxury services, souvenirs.
    12.  Personal Expenses: extra $: snacks, alcoholic & other drinks;
           alcoholic beverages: limited, if at all.
    13. Flexibility: Little ‘basic package’ flexibility: rigidly designed, YET,
          often more ’"free-time"’ options for solo walkabouts.
    14. "free-time" is usually significant
           (Rick Steve's’ Tour: 36% of morning, afternoon, night segments.
    15. "free-time"’ expenses: No! Uber, food, souvenirs, excursions, tips

FYI, “Best & worst package holiday providers”: https://www.which.co.uk/reviews/travel-agents/article/travel-agents/best-&-worst-package-holiday-providers-agVuo5r7eV33

       Rick Steves: ”Tips for Comparing European Bus Tours”: https://www.ricksteves.com/travel-tips/trip-planning/comparing-tours