It's not a side-by-side comparison and is kind of snarky, but this clip has gameplay of a number of biomes and creature types plus shows what they sold versus what they delivered in Ark: Survival Ascended, for those who haven't been able to play the Early Access yet. There are also of course growing numbers of other videos up of the game by now.
IMO, asset quality holds up pretty well (repetitive but rich terrain and a lot of vegetation, which thankfully often reacts to interactions even though it's canned physics movement from what I can see,) and reports are off and on as far as how well it runs. (There are some tricks to get it to play with your machine a little better, supposedly?) The lighting outside of daylight GI was corny in the trailer (albeit with charming coloring) and the final game shows tons more of those mistakes and unforced errors. (There's a part where a dino in the shade glows green like neon partly from what looks to be bounce from the grass, which is both impressive and unfortunate.) And creatures look fine in their general animation but really don't adhere to the world well or have much enlivening detail work up in. In very good and some quite bad ways, this looks and runs about as I'd expect a UE5 drape-over of a startup's runaway-success GAAS quickly re-injected with money to glow up fast while polish is left out for the sequel (maybe) would be.