its depends on speakers if they are fragile paper cones 88db which can handle 20wats i would dsay no diference. but if they are able to take some power ,practicaly most subs will fail/burn/smoke/crackle. in the second case i would look for sub with no less than 115db/30hz.
also keep in mind that dicortions in lower range is less noticebale but at hefty levels(which are needed for 83-86db subs) most subs have 10%-15% discortions which is realy too much.
also keep in mind that dicortions in lower range is less noticebale but at hefty levels(which are needed for 83-86db subs) most subs have 10%-15% discortions which is realy too much.