Well, there we go.
Spoiler: this time
Show
Popeye wins because cartoon logic trumps anything based on "real" physics. Its honestly a fairly fair judgement to take overall. Popeeye has greater feats up to and including just going no to the universe being shut off, and being disintegrated and eating spinach to heal anyways. Even though we have never seen any sign of saitama taking actual damage in combat,
nor have we seen him fail to do something physical, or even struggle to accomplish it, it just doesnt match up to reality warping cartoon physics.