Mike, amazing how they cut down the tank capy and added a small slide out that equals the weight of my 165-s. I thought my tanks were small. But, nooh, propane breath, with 15 gal fresh; 6 gal. grey, and 6 gal black, that won't get you too many nights for two unless you are extremely anally retentive. The 'wet' weight is about the same on each. If you get the EOP pkg., the upgrades keep coming adding some great features and a lot of weight to the total. As a comparo, the 80GS is the same width and height, but a little shorter than my 8'6" floor. Did I read the brochure right and there's no bathroom sink? The E-W bed would be a deal breaker for me. Younger folks who don't mind entangling during the night or don't have to get up in the night won't have a problem. Without wings, storage seems to be at a premium. I do like the night shades and 4 gal hot water (mine is only 3 gal) but the Lance 650 has a lot more features with less weight and no small slide out. What's the total 'out' on the slide? 12 inches? Of course, every square inch on a TC that small means something.
It's all a trade off. Many moons ago, TC mfgrs. made their introductory/small product as small, light and compact as they could make it at the time. With newer tech and materials they keep upgrading but the bottom line on weight seems to remain about the same. The OP has enough info to make a lasting decision.
jefe