my brand X pipe > all other mid pipes of any style/brand including your brand X pipe.
go with the one you like the sound of paired with the cat back that you like the sound of best.
Dr. Gas invented the x pipe. All those others that dont use two 90 degree bends mated together for the x arent true x pipes imo. They use a funny clamshell thing thats closer to the internals of a pro chamber than an x.
EDIT: I'm not sure if they actually invented the X, but i know for a fact they were one of if not the first company to market one for a Mustang.
I was curious so I did a little searching around, it does appear that Dr. Gas was one of/if not the first to market an x-pipe.

This is a Bassanni "X pipe" but this to me is NOT an X, this is closer to an H IMO.
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This is a Dr. Gas X pipe. This is now it's done.
View attachment 191807
By the way, apparently Spintech agreed as they use Dr. Gas X crossovers in their mid pipes...so essentially a Spintech X is a Dr. Gas X.