Since one of the sites has a link to the other saying something about "for other shows at this location, follow this link", I'd say it is pretty obvious they are 2 different shows that use the same venue.

I have never been, and I have no idea if one of them tends to be bigger or better than the other. I've been considering going though, but never realized there were 2 different Hamburg shows. I'd love to know if there tends to be any difference between the 2 or if they are about the same.