I've tried both of them. The spinning reel seemed quite tight, but solid, (it was brand new), and the only question mark I had was that the bail spring seemed very light.
I didn't fish the baitcaster for as long, but I loved how it felt. Very smooth.
They were both on R-type rods, which I really liked. The medium action spinning rod would work for me, because the tip is a little stiffer, which allowed for fishing heavier baits that I would with my present spinning gear.
I want to check out the Abu Vendetta rods before I buy one, though.