Is this a subwoofer issue or just

Friends: I have two very similar amps in price/specs (known brands). I can only keep one of them.

I A/B tested them with the same set of speakers (Totem) and single subwoofer. Amp A sounds better than Amp B without a sub With the sub, Amp B sounds a bit better, but not by much.

Is Amp A the keeper (and I need a better sub)?

Thank you....

p.s. Sorry about the title...I cannot edit it now