PS2 and PS4 comparison: https://www.youtube.com/watch?v=nbAhDwplDr4
This confirms what I thought earlier about the locations in the trailer not being ones you can use to accurately gauge the extent of how true to the original's art style the remake is. Aside from Wander, who looks way more naturalistic than an Ueda character should look IMO, it seems to be impressively true to the aesthetic of the original so far. We won't know for sure though until we see footage of the more surreal, dreamy locations.