And not to forget the USA made SUB Sterling.....in the same way the USA SUB is a cheaper version of the 'ray, the USA SUB Sterling is a cheaper version of the Sterling. Same sort of differences as the other USA SUB basses (no contouring, textured finish) but has 3 band eq but no pickup switch.
You don't tend to see many USA SUB Sterlings around. I really like mine - sounds great and I prefer the thinner neck on the Sterling. I got GAS for USA SUB basses a few years ago and bought three; 4 string, 5 string and the Sterling!!
Watch the 'for sale' section in the near future, I'm considering selling the 4 string USA SUB (blue one in my profile picture) because I always use the Sterling and it doesn't get used. I was going to sell it a year or two back but when I played it again, I really enjoyed it. That might well happen again!!!