Yes if price is no big deal , go for it .
I didn't say fit cheapy anything ... just saying if one vac is gone , the second may be as old ... he could fit a pair of new Lamb 5.7 for 100 each .
As far as i can can google ... performance is pretty much the same . The 7.2 may run a bit cooler , but the blade width , extra mass means bearing life is no greater .