Absolutely. I actually have one of MFREY's keys, so can give a direct comparison. Again, the 1913 rail version of the TLR-7 Sub is what fits the PX4CC.
TLR-7 Sub on the top, TLR-7A on the bottom:
Attachment 75637
TLR-7 Sub on the left, TLR-7A with MFREY's key on the right:
Attachment 75638
TLR-7 Sub on the left, TLR-7A with MFREY's key on the right (mounted, with both pistols aligned at the trigger pins):
Attachment 75639
TLR-7 Sub interface with the accessory rail:
Attachment 75640
TLR-7A with MFREY's key interface with the accessory rail:
Attachment 75641
TLR-7 Sub mounted:
Attachment 75642
TLR-7A with MFREY's key mounted:
Attachment 75643
Comparison of both lights mounted:
Attachment 75644
The two lights are positioned at about the same location when mounted and protrude similarly from the front of the gun. They have the same controls and provide the same illumination capabilities. I would say the TLR-7 Sub fits the accessory rail better than the TLR-7A with MFREY's key, but I've also never had any issues with the latter over the past few years. I would imagine holster selection for the TLR-7 Sub would be better than for the TLR-7A with MFREY's key.