I think it comes down to this. Odin will eventually die as he needs sleep to rest and recover and will eventually die (as he has) However, Zeus won't ever die and has existed far far longer then Odin ever has thus imo estimation is much more seasoned. There is no evidence at all that Odin is more powerful at all as more feats in attributed to more camera time. Fact, is people use the thor reference to zeus when I believe it was on panel that he was playing around with Thor. I wish somebody would post the scan of Zeus erasing Thor and one of the Pantheon Gods (Ares, Hates, Herc) because they weren't working together and then immediatly restored them as a sign that you better work together in this battle. I think it's pretty clear imo that zeus is > or at the very least equal.