Antur overall is a bit more 'full on' - as has been said the blue at AS could be compared to the reds at BPW. BPW has more variety though.
After the morning at BPW I thought I preferred Antur by quite a margin, but after the afternoon picking and choosing my favorite bits of trail (Wibbly Wobbly into Rim Dinger into Coal not Dole FWIW) I reckon there's not much in it.
The uplift at BPW is good, but the bus crew at AS are amazing.