Something else not mentioned is the type of use that the trailer is going to be subject to. A "lite" version could very well be suitable for lots of campers. If you only travel a couple 1000 miles a year and just do 20 or so nights of camping then you don't need a heavy built trailer.
On the other hand if you travel a lot and then you would want something that's going to take more abuse.
I know several friends that have lower end trailers that serve them well. They only go out a few times a year and probably never put more than 800-1000 miles on their trailers.
Given a 10 year life span as an example. I'm sure the lighter version will hold up as well under light user conditions as well as the heavier built version that's being used more often.
Each has their own boundaries.