So, when I was removing my CV joints from my front diff and
transmission, almost all of my bolts were of the triple square
variety....except on one CV, which had 6 allens instead.

So, which is considered "better"? I went by my VW dealer, and when
the ordered some, they came in as allen head, not triple squares.

They had some triple squares available, but they were slightly
shorter (5mm maybe) and the threads didn't extend as far.