Neither for IPSC. Go for a Para P16-40 Limited. You can go with hicaps 20 rounds with Dawson's basepads or shoot it in Limited 10. 40's are easier to shoot even at the same powerfactor. Even shooting in Limited 10, I would still stick with a double stack because it's easier to make mag changes when you have a nice big magwell.
But if price is not a factor, go with a custom SVI.
But if price is not a factor, go with a custom SVI.