Both work in terms of discoverability.
Do you search highest zapped content?
No. I don't follow zaps, zap amounts or who's zapping what. Zaps come in and go out. I also don't look at the "muted by" lists or follower counts. I measure content by it's quality and people by how they treat each other.
Sry just got up and only had one coffee so far. If you meant how do I discover content, through searching tags and through content shared by people I'm already following. I don't give much about "trending" content on some of the apps since those oddly show the same bunch of people every day with 1 zap or 10 zaps or 1 comment or 10 comments. The best content discovery is through tag searches and by growing your network on nostr.