I cannot see Outlaw replacing a product with something inferior. There are some improvements, notably the balanced inputs. As far as construction goes, they seem to be built in a similar manner (separate channels/heat sinks). But ultimately, it is about how well it sounds and performs. If I did n't already have a model 7500, I probably would have picked this one up to try, knowing that I probably would not be disappointed.
I think they still have the 30 trial/money back guarantee.