OT Browning Hi-Power 9mm vs 40 S&W

[Philip Glotfelty]

I'm considering an FN GP-35  to go with my STG-58.  (OK, it's better
know as a Browning Hi Power, but I'm trying to add some FN-FAL content
to this e-mail)

I was all set to go with a 9mm but I see Browning is now selling it in
40 S&W so I'm wondering if 40 S&W might  not be a better choice?

Can anyone comments on how the Hi-Power shoots in 40S&W or opinions on
.40 S&W vs 9mm.  Would you rather have 13 rds of 9mm or 10 rds of .40

Thanks
Philip