Alfine is the better choice for a town bike anyway. Not sure how PX are getting away with no chain guard on that; it's not a racing bicycle, and chain guards are not optional on city & trekking bikes. I guess, as usual, they figured it would be fine to just wing it.
Indeed, those PX wheels are 2.4 kg! Brakes and wheels are good places to spend money, I'd rather spend on them than e.g. cranks in the PX build