X pipe will have a better scavenging effect and wil produce more power over a h pipe. An x pipe will be slightly mellow in sound where as a h pipe will sound a little harsh.
that may be them, but a lot of big name brands run x over h. Borla, Magnaflow, Stainless Works, Solo Performance, heck even Flowmaster has systems with an x.
I had my complete system installed a couple weeks ago and I just looked. It's x. Hardly no drone at all. Totally love it much better than my Corsa I had.
I have heared both stainless works and meisterchraft, both sound boss but i cant justify spending 3k on the meisterchraft (GTHaus). so my money would be on the stainless works...but thats just me