This question has been brought up numerous times lately. Ultimately in the end it comes down to personal preference but in my opinion park skis are evolving into wider models for good reason. 8 years ago the Edollo at 98 underfoot would'nt exactly of been considered a specific urban, park ski. They offer more stability in general imo, making surface swaps, and landings come a little easier. They're not as quick to get on edge which is nice in these situations. The term "better" shouldn't really ever be a concrete answer to this question though, if you're looking to do insane tech tricks a 80 something waist ski is only going to help you with the fact it'll be lighter & more nimble / offering a lighter swing weight.
I like wider skis on rails, they just feel better underfoot to me. There's less room for error in my general opinion. 95-105 underfoot is a perfect park ski imo