Can't speak for the nostromo, as I have recently bought the Logitech G13. The game pad takes some getting used to but is kick ass once you do
But I can say that I did alot of research before buying it and the nostromo was my second choice.
Most reviews I read had the nostromo coming out as winning in a heads up between the two. But It all comes down to preference, gaming style and hand shape. I personally really liked the G13's screen, Shape and overall build quality. Alot of reviewers said the nostromo had a tenancy to break easily and compared to the G13 it does look a little cheap in my opinion.
There are plenty of video reviews on you tube, You need to decide whats best for you.