All default snap apps are much slower than their deb counterparts. Chromium snap is also much slower. The chromium-browser folder contains the whole browser and the executive in it runs the browser in a sandbox and faster. Chromium from that chromium-browser folder starts within 5 seconds in Fedora. I am writing from that Chromium in Fedora.
Interestingly, Yaru-dark works quite well with Gedit, the default text editor of both Fedora and Ubuntu in Fedora, but in Ubuntu the cursor is invisible. Most of us like to use dark background to ease eye fatigue.
Btw, there’s no flatpak default apps installed in Fedora. But, users know any can be installed, if they like/want/need. Including slow starting snaps by default, only make people wonder what’s wrong with Ubuntu. Maybe, a disclaimer should be made on those default apps, just like on the default gnome shell extensions?