I have the Ultralight derailleur 11 speed and also the Standard Alfine model and the weight difference is notable when riding. It’s also quite noticeable when carrying the bike in its folded position. I think it’s something like a 6lb weight difference. If I was going to buy another one I’d might choose the Ultralight Alfine model as I do appreciate the simplicity of the hub gear for the folding bike. Also, I have an issue on the Ultralight model where I’ve been having difficulty positioning the shifter and brake on the narrow handlebar in such a way that they don’t rub against my thumb while riding. For some reason my bike came with XTR brake levers rather than the Hope Cura levers that appear to leave more room for adjustment.