for a lot of these its reaching to get to 10 specifically the difference is an amount but not as high as 10, ulq uses a lance technique ichigo uses getsuga neither with a number multiplier. Ulq compares his getsuga to a cero not his black cero oscuras. He names oscura when he talks about it he doesnt just call it a cero besides the time he introduces it to ichigo. There are multiple ceros, a cero, cero oscura, Grande re, Bala. Any of the variations are named or called out as not a normal cero so just saying cero...bad no multiplier.
Ichigo =< base ulq, mask ichigo > base ulq, res ulq > Ichigo. They relative buddy
also if you say hes directly comparing them hes saying hes a puny human, the sentiment said when he says you can copy us but you dont have our power. so its not as strong as cero oscura
and ichigo drawing on his hollow powers should most def NOT have a multiplier it goes from making him loose to base YAMMY to being stronger than 4th espada Ulquiorra Cifer something not done till he DIES twice, nearly dies 2 times, and trains. Or being conservative after he trains and dies and almost dies and gets resolved amped.
being 100% it is a number but not 10x