Golly, I just couldn't really tell you why people are comparing a replacement to its predecessor, sure is a mystery...
Len also compared the attraction to its predecessor in his impressions. Are you going to attack him for that too? I don't know why you're jumping down MY throat in particular.
None of this has any relevance to anything I said. I said that the sets in Splash looked more colorful and were hand crafted by someone with experience in traditional animation (or at least knew better how to translate animation into a physical environment). Appropriate to the source material's art.
Princess and the Frog is ALSO a vibrant traditionally hand drawn animated film. The difference is that Splash actually felt like its scenery was designed to feel like an animated film. TBA's scenery both on the exterior as well as those initial interior scenes is a mishmash comprised of a few brightly lit corners with a handful of cartoony characters, but then the rest being mostly darkly lit realistic looking greenery.
It again gets a bit more stylized when you are shrunk (there are different major problems in those scenes, but at least it forced them to create some more hand-crafted stylized props that fit better with an animated film). The finale is also colorful, though again with the same artistic mishmash of realistic juxtaposed against animated.