Neither?!

Both kits have a legion of inaccuracies. If there was an accurate F-111 model available, both would compare in accuracy as the Aurora Me-109 kit to a Tamiya Bf-109, if that gives you a feel for my distain and frustration with both.

That said, given the price delta, I would get the Academy kit, with a changes. The Hobby Boss kit corrected a few things, making the assembly easier and the surface detail nicer, but they copied most of Academy's mistakes and introduced a number of their own (especially, but by no means limited to, the canopy). It looks like the boss came in Friday afternoon at 4:30 and said he wanted the design on his desk at 0900 Monday morning; simply horrid, sloppy research.

If you can find one, get the new Academy F-111C (ACA12220) as it has a number of subtle corrections to the original, it just has the long wings, so you'll still need the E kit for those. For an experienced modeler, the aftermarket parts for one will work on either kit, so that isn't a big factor.

Get the SAC struts for the Hobby Boss kit (48079) as that is a definite problem with the Academy kit. They have a set for the Academy kit, but they're modifications of the Academy gear and not very good.

D-Mold TP-II intakes are a huge plus for either kit as HB copied the crappy Academy intakes that have inlet spikes that are 18" too short. Everyone's TP-II intakes (including D-Molds) are too close to the fuselage (they're supposed to be 11.5" from the fuselage and kits have them about half that far out).

A prominent AM company has had a number of masters for correcting various issues with both kits for a couple of years now, but they haven't make it to the top of the pile. One of the most important you can do for yourself. The biggest construction issue with the Academy kit is the lateral seam across the top of the fuselage. This always cracks due to lack of support. Make one that will fit into the slot formed by the narrow internal reinforcement along the sides of the fuselage and make it fit tightly into the void across the top of the fuselage.

The cockpit (including existing AM ones) is a mess. AMS does some seats that help (AMS48010). A couple of other pointers are that the side and center consoles should be dead level, not canted/angled and the instrument panel should angle back 11 degrees, not vertical like everyone has it. This will make it sit 11" under the glare shield, which will require thinning of the glare shield.

Another thing that everyone has wrong is that the dorsal strake should be 6" high, not 3" and the angle at the front should be a sharp break, not a curved transition.

I could go on, finding fault with nearly every piece of both kits, but you get the drift. Now you have an inkling as to why, with more than 1,000 hours in the real thing, I still don't have a completed F-111 kit on my shelf.