I believe the Cap's would give you more output, I seem to recall reading somewhere that they can hit 116db at there port tune from a 1m ground plane measurement. So you'd subtract 6db to roughly geta 2m number right. And I think they would pick up about 6db room gain.
I'm not 100% sure though so someone jump in and correct me if I'm wrong.
I would shoot RMK! a pm, I think he had dual older style passive Caps before upgrading to dual Orbit Shifters. So he could give you a little insight as to what you could expect from them.