It depends on how big is the 17/18 gap. Cell was being dominated by a Weighted Piccolo and couldn't even fight back. I personally don't see Piccolo dominating 18 like that.
Maybe like 88/100. It's not too big IMO..but he's not her rival. That is stated by #16.
Where #18 stacks to weighted Kamiccolo is more interesting..she can be equal or slightly below him. The way Android #17 says it...is that #18 is not even his rival which would make weighted Kamiccolo stronger than #18.
I tend to take #16 and #17's comments in conjunction and get something like this.