A big mulie is a higher goal for me than a big whitetail. Spot and stalk isnt easy. Mulies still have a deers vision, nose, bigger ears, etc....they can detect you just as easily as a whitetail, its just mulies are often curious from what I've read, giving hunter's a fake impression of being dumb. Big bucks won't be dumb, and you wont be able to slip up any. Either way they wont be curious within bow range, lol.

Best of luck and post up pics when you arrow him. I agree spot and stalk is a rush, and I'd take 3 days of it over 4-5 days in a treestand or blind, any day of the week.