The 1050 and 1070 were both designed by Outlaw in conjunction with Eastech, and the 1070 is manufactured by Eastech just as the 1050 was. The Model
990 is based on the Sherwood P-965 platform and manufactured by Etronics, but that's the only Outlaw unit being manufactured by Etronics.
For what it's worth, I owned a 1050 and a Model 950 (also manufactured by Eastech, and from which much of the concept for the 1070 was drawn) and the 950 was a nice upgrade from the 1050 as far as the pre-amp section was concerned - the sound wasn't all that different, but it was cleaner. (I could probably have gone into greater detail at one time, but it's been ~4.5 years since I last had the 1050 in my equipment rack - my old
950 review might shed some light on the difference between the 1050 as pre/pro and the 950.) The amp section of the 1070 should be pretty darn comparable to the 1050, with a bit more power if anything - some others around here with 1070 experience may be able to speak to that.