I think no matter where you look in Pattaya you will find that older projects generally have bigger condo unit types with fewer project amenities and newer projects will have a larger number of smaller units but more project amenities. Older projects will also likely have a fewer number of total units. Always exceptions, of course.
For example, the smallest condo type available at Northshore Condo is 64sqm. Total number of units less than 200. Nice pool, nice gym, nice ping pong and snooker areas, small library, nice lobby, lots of garage parking, good front desk. Built before things like sky pools, sky gardens, sky lounges, jogging trails, lagoon pools, co-living spaces, theatres, etc., have come into vogue.
The Riviera Jomtien and Riviera Wong Amat projects, in contrast, have around 1000 units, with many of the units less than half the size of the smallest Northshore condo. But, you get a ton of project amenities. And, most of the new projects do offer some larger 2-bedroom units if you need more space. My partner and I had 2-bedroom units at Unixx, Axis, Lumpini Park Beach, and Centric Sea.
As always, it's important to first select the general location you want to be at and then find the project that best suits your lifestyle and your budget. If you never swim but an on-site gym is very important, the View Talays probably wouldn't suit. If you don't drive, you might want a project close to the baht bus line. Unixx, I believe, is still running its own shuttle bus. Some of the newer 1000-unit projects can be very busy, with more of a hotel atmosphere than that of a residence. Some love that, some don't. No project is perfect but the goal is to come closest to your wants, needs, and budget.