Challenge Sport X-Pipe vs. Active Autowerke HFC X-Pipe

[E92M3LMB]

I'm interested in getting either the AA HFC x-pipe or the RKP (challenge) sport x-pipe. Would anyone happen to know the sound differences between Challenge and AA? I believe AA uses 100 cell cats as opposed to 200 and places their cats in the primary location instead of the secondary location like challenge does so I'm just wondering how that would effect the sound.

I'm also planning on pairing one of those x-pipes with either an Active Autowerke Signature rear section or a Dinan Free Flow rear section. I've heard that the AA had a little bit of drone with their first version but it was reduced when the second generation came out. I believe that the Dinan may be a little quieter but the plus is that there is no drone with it. To my understanding, the AA has more of an exotic tone to it while the Dinan has more "grunt", but they both sound excellent from videos.

If anyone has any videos with these combinations of x-pipe and rear section I'd be happy to give them a listen!

Thanks