Papajoe, my CT also came with the Galco holster.
I had been using a Desantis Nemisis prior to buying the CT and liked it very well.
I just measured the opening of both the Galso and the Nemisis...without the gun in place and found the two holsters to be almost identical in height. The Galco was about 1/32 smaller in height. To be fair, I had just taken my P-3AT out of the Nemisis holster.
Photos of the two holsters:

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My wife modified the Nemisis holster to accommodate the CT by removing the stitches in the center part of the holster.
Here is a photo of my P-3AT in the Galco.

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And a photo showing a P-3AT in a Nemisis holster. Not my photo or gun! Sorry I can't remember who I stole the photo from!!

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I like both holsters. I do seem to carry the Nemisis somewhat more for some reason.
Old Bill