as far as i can tell, the Area P (which isn't even on their website) is a straight-up vintage P pickup, only with alnico II magnets.
i can guess that the weaker magnet reduces the punch and output a little, maybe so it'll be a better output match for the J bridge pickup?
i have put together P/J sets with other nice vintage P pickups like the fender original 62 or the duncan vintage, paired with the dimarzio area J, and that sounds really good.
Guitar Repair Gnome
Alpha Music, VA Beach