The end caps on this one are 6.3mm thick and milled out in the center. This makes the outer edges much tougher and can be ground/grinded without distorting.
This brace might get welded in place... (depends on where it goes). This makes sense for a suspension corrected fork as its a torsionally stiffer structure. In the BMX+ application it makes footjams possible and probably safer on one's toes than any other fork.