Oh, I totally get your confusion! I organized a similar trip last year for about 30 people, and honestly, the choice of bus type really changes the experience. For example, the standard coach bus is great if you want everyone together and plenty of legroom, plus they usually have reclining seats and Wi-Fi which is awesome for longer drives. Mini-buses can be more nimble for city traffic and parking but might feel tight with a bigger group, especially if you have luggage. Sprinters are super sleek and comfy for small executive-style groups, but again, luggage can be an issue. Executive buses are like a luxury suite on wheels, great for comfort and privacy, but they’re pricier. School buses? They technically work, but they feel pretty basic compared to the others. If you want a practical overview and even quotes for Las Vegas specifically, I found this site really helpful:
https://coachamerica.com/destinations/lasvegas. They list all bus types with amenities and seating so you can compare and see which works best for your group. It made planning so much less stressful for me because I could narrow down the options without calling a bunch of companies.