I have seen them both many times. IMHO Digweed, at his best, is better than Sander but Digweed also has off nights when he experiments too much. Sander, on the other hand, has never disappointed me. But Sander comes to NYC more often than Digweed and the sound system at Spirit is better although I usually like the vibe at Crobar more. Hmm... I guess Im not really helping you am I? Well... if I had to choose I would just go with Digweed - he may not come to NYC for a while and if you are lucky, he may just put on one heck of a show.