Lots of people here use regular 38 super too, not super comp so that kills the better feeding idea. My 9mm feeds from the mags more smoothly than semi rimmed 38 Super did.
If you shoot super comp only you need to sort almost by headstamp which sucks.
My 38 gun was the tiniest bit flatter than my 9mm but it was ported whereas my 9mm is not. I sold my super cases and it paid for half the 9mm gun. The choice was easy when AP100 dried up and the drums of autocomp became available.