I have the Ares, and I've handled the Presidio. The Presidio is better suited for cutting jobs, because it has a higher grind. The Ares is no slouch as a cutter, but it does have a shorter primary grind, and the blade is narrower. The Ares, in my opinion, looks nicer. I also find its handle more comfortable. But lots of people like the Presidio's handle, and it is very grippy. But it eats pockets like a ravenous wildcat.
Both are very nice knives, my personal choice is the Ares, but then again I have one of the limited editions. If I had to choose between the current production Ares and the Presidio, I have to say I'd be hard pressed. I'd probably choose the Presidio just because I don't like coatings.