I suppose it's a matter of opinion.
Here is a visual idea of the "fractions of an inch" involved here.
These are both Gen 4, and the G40 is an inch longer than a G20 (otherwise identical in size). My G20 is packed away in seasonal gear.
The G29, with a Pearce pinky extension, is 5/8 shorter than the G20/G40. If it matters, I think the LOP is a bit shorter on the 29 too (which may be important for those with medium size hands).
To tell you the truth, I've chosen not to stick either of these options in my pants, lol.
I'm not aware of a larger 10mm option to carry IWB than the G40/G20 pistols.
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