Hey Nick,
Yes...
The vents can be rescribed. But should you have to do it at all on a model kit in 2013?
The supercharger intake can be replaced with aftermarket, but where's the advantage over the Hasegawa kit in that?
The Buelen are either too small, or the intake is too low; which may mean the thrust line is too low as well... See Hasegawa above.
Bf109G length in 1/32nd scale is 281.8mm. The Hasegawa kit is actually a tad long, despite most people' opinion that it's short.
But 2mm in 1/32nd scale is a lot to be short. Revell seem to have taken the Handbuch length measurement (8.94 metres)as gospel, despite it being innacurately carried over by Messerschmitt until the G-10 variant. The shorter length stems from the original measurement of the 109F prototype, which had a blunt spinner much like that of the E-4/E-7 variants... This was never changed in Messerschmitt documents for some reason, carried right through the F and G series. Which means, that if Revell sticks to that 280mm, that they probably never actually measured a 1:1 scale Bf109.
As for the price, £19.99 is pretty good value for a 1/32 scale kit... If you're in Europe that is, with no Customs charges or import duties between EU countries. Start sending them abroad, and you run into the same price factors that Europeans encounter with Japanese or other Far East kits, and pricing suddenly becomes a significant factor. For instance, the Revell AG re-boxes of the Hasegawa Bf109K kits can run anywhere from $80-100 Au in my neck of the woods.
So from my perspective (and I'm happy to stand corrected), there appear to be no significant detail advantages, no dimensional improvements, and no price advantages over 12 year old Hasegawa kits that I already have in the stash.
I was really hoping for much more...
S