Alpha 1's are pretty bomber with their triple zone core (three layers of burly ash throughout the ski). I was on those for the past couple years... Recently switched over to the AR7 which shares the same core and have been loving those just due to the fact I have a few extra mm to work with underfoot for bigger jumps and what not
But yeah you can't really go wrong with either of those skis. I'd say if you hit a bit more rails than jumps go with the Alpha 1, and vice versa. But they're both pretty damn stiff and won't wash out on you