Why keep arguing over the same. Make your point, Live and let live.
For the statement you made "1.5 will ALWAYS have better mileage" NO. It won't always have better fuel economy, it will have on highways (100+kmph)and in city with someone who likes to enjoy hard drives (relatively heavy foot)
I've tested it, if driven carefully with soft foot, following speed limits in city (its mostly 40-60 for my commutes) the 1.2 cvt definitely does SLIGHTLY better.
For everything else you may very well be correct, it might not be fun or value to money. But it WON'T ALWAYS return lower FE.