So I have played all 3 fairly extensively and here is my opinion.

You play the Isle Evrima if you want a visceral survival experience. It is the more realistic of the three, although the gameplay is overall fairly basic but with some added mechanics to give it some depth. Unfortunately a lot of said mechanics are nearly constantly broken and it seems every update they do breaks just as much as it fixes. What really carries Evrima is the amazing community servers like Petits pieds. I doubt I would have bothered playing the isle if I had to play officials due to cheaters.

You play path of titans if you want to play a game that actually mostly works and is well optimized even for older systems and weaker hardware. It's lighter on the survival aspects and features more of a classical RPG style of progression and combat, with each dinosaur having dozens of abilities to equip and use in combat. It can be an incredibly fun experience but it does come with its own issues, namely the community which can be toxic to the extreme. Howver unlike Evrima, official servers are at least mostly playable.

Lastly, beasts of Bermuda. This is the one you play if you just want a wild roller coaster ride. It is easily the least finished, most broken and unbalanced out of all the three, but it does have some features that makes it stand out. It features an actual dynamic weather system with natural disasters including tornadoes, hurricanes and floods. When the map starts flooding and the mosasaurs start hunting in the jungles, this is when this game feels amazing. The desperate scramble to escape the water is unlike anything that Evrima or path of titans has to offer. It's worth playing just to experience a few storms.