I wouldn't let the similarities you pointed out make you think they are the same product. I know a lot of products that look the same, are packaged the same, and basiscally perform the same, but are definitely different produts. Just look at the soft drink industry. All the cans look the same other than what color they are. Look at the Coke rip offs. Same type of container, same looking contents, basically the same taste. Totally different products.
Lots of products are made in Florida. Wolfgang, Pinnacle, Detailers Pride, Four Star, etc. Does that mean they are all the same just because they are made in the same state? Lots of cars are made up in Detroit too.... does that mean anything?
Anyway, I wouldn't let the fact that they are similar lead you to believe they are the same product. UGE has been around a couple years longer than Sonus has anyway.