Mine isn't noisy, although I do still have the baffle in. With the baffle in it probably sounds very similar to the OE one, but I can't comment on how loud it is with no baffle - I decided I didn't want the bike to be too loud.What is the reason you want to change the OEM one? more HP? if yes, it is a total waste of money.
If it is aesthetics reasons, this is a personal taste. As also for the noise. Generally Remus silencers are quite noisy.