The B450 Aorus Pro Wifi has Wifi and bluetooth on the motherboard installed, where the B450 Aorus Pro has not.
But the B450 Aorus Pro is more modern than the B450 Aorus Pro Wifi and you can always install a wifi card with an bluetooth usb in your pc.
You should get the B450 Aorus Pro and not bother with wifi that much. use cabled network, unless you don't have one, still get the B450 Aorus Pro and then a wifi card.