Not quite segasonic, Sonic Adventure Limited Edition was actually a US only release. Basically since you could rent DC units a few months before the launch of the system, this version of SA was created because the final retail version was not finished yet. SA:LE is a straight port of the original Japanese release but with the english voices and text added. This version was completed before SoA worked on getting the characters mouth movements closer to the voice samples (which they never did perfect, but in the final US retail version of SA, the mouths are MUCH more in sync than the ones in SA:LE and japanese SA were) and none of the internet features were added yet either.
So SA:LE was never offered in retail stores and was a rental only item. Sometimes you can come across used copies of it though.