Well, I found the IPPs to be quite glittery, and not the sort of smooth glow you'd get from an MSF. Also, the color payoff on the IPPs wasn't too strong. They're pretty to be sure, but I personally didn't see myself wanting glittery-glowy cheeks very often. If it's a look you love to do, I'd go for one of them.
On the practically side, I bet the Cargo blush/bronzer duo you'd get more use out of. I had one of their blushes a few years back, and it was great quality. It depends on the look you are going for, but for my money, I'd probably end up using the Cargo more often. Hope that helps!