Can you elaborate in which use case bazzite is better on deck than stock steamOS? Whats the difference in terms of battery life? What are the tradeoffs?
Personally don't have a deck.. yet. I run Bazzite as my OS on my PC though. However, I read and see a lot of people running Bazzite on decks on forums and discord. This is also where i'd recommend going for answers such as you asked for. If I had to guess there isn't much difference when it comes to battery life - they're both running the same kernel. The reason you would want to switch, as shown on their website is to unlock the ability to run flatpak on your deck.
I run a rebased kionite to bazzite on my desktop pc, so its not like I hate Bazzite, I love it.
All in all not a very sensible recommendation, in my opinion the risk of bricking far outweigh the aesthetic appeal to run Wayland apps.