Part 1: Alright first let's scale goku and explain things. _Mui goku is universal to low multiversal at best. Any scaling more than that is overrating and over interpretation. If you do so i can just say Saitama is infinite which I would not. _Things said in bogs,guides and whatever the author said you can keep it to yourself the only acceptable evidence is the evidence in anime and manga. Why? Simple because if db author goes out and says goku is hyperversal then it's very lazy writing and any author can do the same like Murata can just go out and say Saitama is infinite which oneshots goku. Btw One said Saitama is a gag in an interview in 2012 but I won't use it.

Part2: _There is not a single dbz or dbs caracter that showed physical feats equal to saitama. Forget about that all db caracters including goku,gods and angels barely destroy a massive mountain with their fists. They destroy planets and maybe galaxies with their ki energy so clearly in terms of feats Saitama is physically stronger than any db caracter including Mui goku.

Part3:Ki energy included _There is a very imporatant point which everyone misses and many even OVERLOOK it. Golden frieza killed cc vegeta in dbs ep 26 when he blasted earth. Goku would have died too if not for whis. So if cc vegeta simply can die from a planet explosion than saitama can simply oblirate the whole earth and it's even worse for him because he can't breathe in space while saitama can. Thus Saitama>cc vegeta which is not far from cc goku. So Saitama is at least a little below cc goku. There is no feat for saitama to challenge him to Mui goku so we'll just wait for god fight.