SLP power flo vs loudmouth 2 axle back
 

Well I have listened to as many clips I could find, I have not heard either live, for those that have them, which of the 2 are more aggressive and how is the sound/ noise level inside the car.
Mine is my DD and I do a lot of work on the phone so having normal phone conversation is important.

thanks in advance.

I believe the LM2 is more aggressive than the Powerflo. If you want great sound but quiet at cruise, I hear the Solo axle back with J pipes is a good option.