Personally I’m not a fan of the U-series processors if you want to multitask. Yes, they have a long battery life, but if you spend that battery life waiting for your laptop to become responsive again, it doesn’t do you any good.

However, my last experience with a U was a 7th or 8th gen Intel, so it might have changed by now.

The P processor usually uses less power than a H or HS version, so more likely it will last longer on battery. The U versions even longer.

However, if you are heavily using it, it could be that the stronger processor only has to work hard for a short while and then switch to the more efficient cores, so it isn’t black and white.

According to a review by LTT at CES they finally managed to improve the build quality. However, I never see a MSI in the wild.