don't worry about the part numbers. i've got beams cams with the same PN as gen3 turbo cams cast into them. eventually they changed them and new ones would come with the 560 or something.
yes the beams exh cam is only useful for an exh cam in gen3 as dizzy is run off the IN cam.
they obv have different part numbers, but what i was pointing out is the specs are essentially the same in regards to duration and lift etc
the black top has vvti on both so can't use in non vvti heads.
my specs are right :)