u/Mast-O-don

Ive been looking at videos and decks of how to build Obeka, Brute Chronologist and the consensus seems to say that electroduplicate's token cannot be saved by obeka ending the turn. What I dont understand is that obeka can save other cards that have "at the beginning of the next end step" triggers which is the sacrifice trigger that electroduplicate gives to the token copy that it creates. So why does obeka work with other effects that say "at the beginning of the next end step" but not with electroduplicate? Also secondary question if multiple items are on the stack and I want the newest object on the stack to resolve but nothing else can I let the newest object resolve then end the turn before the rest of the stack resolves?