Have a look at Wander's expressions in the original, compared to the emotionless doll he is in the remaster. It's just one tiny thing, but takes away a lot. In the original, he was panicked and under constant stress and strain. Understandable, considering that he's battling giant monsters. In the remaster it's just another day on the job.
The one thing that the remaster can never replicate is the mystery that the original had. People spent years going through every nook and cranny. Digging up unused areas, beta Colossi, and special weapons and items. No other game in history had what the original Colossus had.
Can't say I fully notice the expressions on the original, but certainly will agree that the remaster do lack facial animations and is certainly a lot more static than the original in these two gifs comparison you sent.
Unfortunately the air of mystery is lost once you finish the game for the first time and you can't ever have the same feeling again =[ even playing the original, the only difference is that through nostalgia you kinda have that feeling burning in inside when you play the original.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."