Despite the Revell kit is nothing to write home about, it is still LIGHTYEARS better than the Aurora kit, for the simple reason, that Aurora got the shape all wrong. The nose drops too much and is too stubby.
The Revell can be built into a very nice model, if you manage to overcome the headlamp issue and follow the 'established' rules of building a Jag E model - which is to cut the sills off the floorboard and join them to the body before painting. The real E doesn't have any seams at the A and B Pillars.
You can also build a coupe using the Aurora bodyshell and the Revell E-type - the Aurora body as such is ok.
The Heller E-Type roadster might be OK-ish, but is beaten by the Gunze with not a narrow margin. The Heller coupe is actually the worst of the lot, because the roof is way too high. It needs to be chopped about 1.5 scale inches to appear plausible, at which point everybody with half a brain would ask himself 'why not chop it more?'
In a Nutshell:
If you want to build an XKE roadster, go for the Gunze.
If you want to build an XKE coupe, go for the Gunze and an Aurora for the body.
And for heaven's sake, scream and yell at the manufactureres to finally tool up a proper one!