I would love to see a pic of a compact Witness P (10mm) compared to a compact 1911... or even a Glock 29.
Anyone??

Glock is 1/2" shorter in length.  Same height within a 1/10".  Specs say the witness is 1/4" wider, but I bet that is the thumb safety.  No wider from a carry perspective.

Sorry, I don't have a Witness P compact.  Only the Glock.  So all I can provide are specs.

From a carry perspective, 4 oz doesn't seem like much, but it is by 9:00 PM.