I personally would stay away from any RV marketed as being "light". It must mean one of two things: either they took out some things and cheapened it to reduce the weight or they used higher priced engineering and materials to maintain structural integrity at reduced weight. Either approach I don't need.
In my experience looking at campers often the light ones are a bit narrower and shorter. Many of them lack enough headroom in the shower so they compensate with a "dome" above the shower. It makes me feel like I'm wearing a space helmet; no thanks.
Lite can also mean smaller tank or thinner materials, neither of which is desirable in my opinion.
Yes, my tow vehicle is a diesel dually so that does help me to ignore the "lite" models more than someone who owns a 1/2 ton SUV for instance.