I have both and all I can say is ... get both
Tho if you can only get one you can be assured that you won't be disappointed either way. Both handle well and feel great in the hand, tho the issues mentioned for each are true. With the Raven the natural place to grip is just at the base of the claws which isn't ideal, and with the Bane, the emitter is secured by a screw and not threaded, so not quite as secure. But both issues are negligible imo, so to me the big difference between the two is the aesthetic. The Raven is a more dramatic sithy claw design meant to convey evil and the Bane, while also badass, has more of an "all-purpose" lightsaber look.