I have installed Allure and am not impressed, it is thin and the locking joints are easily damaged. And it is somewhat easy to scratch. Our adult son's house got flooded 4 weeks ago and I am in the process of installing Smartcore vinyl planks from Lowes. This stuff is more expensive, about twice the thickness of Allure and super hard surface. The joints really lock together with almost invisible seams. Like Allure, since it is all vinyl it can go everywhere. I wouldn't skimp when it comes to flooring in an RV as it gets more abuse than just about any other part of the RV.
As for weight, when you consider the weight removed by taking out the old carpet, your real net change in RV weight is pretty small.
Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'11 Crossroads Cruiser 32MK loaded