Hello all, I am looking to get my first pair of Iron Hearts, specifically the UHR. I am trying to find a fit similar to the 2009 sugar cane cut (slightly slim/ straight). From what I've seen the 666 or the 634 are the closest, in the photos I've seen the 634 can be tight or loose depending on the person, and the 666 can be slim or super skinny depending on the person in the photos I've seen. I am 6,3 and slim to medium build. What should I go with?