Its kinda of like asking which is better, Ford, Chevy, or Chrysler.
Its difficult to judge a TT based on just weight since there are so many ways companies use to determine their published weight. Some include the hitch weight and some don't. Trail-Lite publishes axle, hitch and the total of the two. However, the published weight does not include any options and different TT maufacturers have different standard equipment and options (and I think many understate the real weight). The weight of options can add up fast.
R-Vision has been around for about 10 years and I'm sure if you read their forums http://r-visioncamping.org/
the will sound a whole lot like the Funfinder forums. My Funfinder has been great so far, but if shopping I certainly would consider a R-Vision product if the package was what I wanted.