X pipe or H pipe?

ON my 98 Tahoe iam going to be cuting off the cats and right now Iam running two flowmaster 40 serries mufflers one of each side of the motor...Well my 02sensors and cats are screwd up so iam going to cut them and put either a X pipe or H pipe on there and I was wondering if there is a diffrence between flow or what and wich is better thanks.

It really doesn't lose alot of sound just makes it deeper.

go with x-pipe it sounds badass, I have an off-road x-pipe on my mustang and it is loud