But if the intention is to compare 2 signals, since both the signals are sampled for same number of samples, the division won't make any difference. It'll only make the difference LOOKS smaller. Isn't it?

 

But if the intention is to compare 2 signals, since both the signals are sampled for same number of samples, the division won't make any difference. It'll only make the difference LOOKS smaller. Isn't it?

Right, it makes the difference look smaller and that is the whole point of the process.