I am fairly sure both are mass produced Taiwan steel frames. The Milwaukee might have better steel. The surly is 4130 (basically gaspipe). They both have great slack geometries, no toeverlap, comfortable and you will keep riding these for years.

They are both overpriced for what they are but between the two go for Milwaukee. It is a smaller company and a really nice looking paintjob, not to mention there are plenty of surly's around.

In other words, they are very similar rides, I like them both but recently upgraded to a friends used Gaansari. Also similar, but nicer steel and now sadly out of business.