Now this is a very hard choice for me. Both are really cool.
I'd go with the Banshee though, it's a fun vehicle to drive around in.
Get a roofed one though. The roofless variant just doesn't look as nice.
Indeed, now this is a comparison I like. Banshee definitely lacks top end gusto but there's something so fun and engaging about it (like a Miata so to speak). I suppose if I had to make a very crude similarity between the two I would say the Alpha feels like a longer and somewhat heavier Banshee.
That's not to say I don't adore the Alpha, because I do, but the Banshee due to its' size is just absolutely wonderful to throw around. Both aren't difficult to drive but the Banshee seems a bit more rewarding when going in and out of corners.
Really can't go wrong with either of these IMO but definitely agreed, the fixed roof variant is ideal (purchasing in Blue seems to make it MORE likely).
If I had the room both would absolutely be in my garage.