I read up on this topic on Greenhulk.com as well. Some guys were saying the LT's were fine in freshwater, but would recommend an Elite if going to salt.
Assuming your location is correct, you should be fine. In the sled world we have loved our Triton trailers. The LT line is a cheaper line which is still better quality than some other manufacturers premium line of trailer. This is true for sled and pwc trailers by Triton.
Some will find larger tubing used on the elite and galvanized hardware. Otherwise, both are fine trailers. I have a triton elite sled trailer, and the difference when talking enclosed snowmobile trailers is much greater. Quite a few convenience items and hardware differences.
When talking a single or double place PWC trailer, it may not show as much. Buy with enough capacity, and you should be fine.