It's a good idea Biggsy but, if I'm honest, a main attraction to the Brompton was the idea of carrying it in a backpack. The other benefit is the size of the fold but I'm just revisiting how much that would mean to me. I don't have any concerns about being able to heft either a Brompton or a Tikit when need be. But to my inexpert eye, if you remove fold size, then the Tikit seems to offer more. I can use my existing luggage, it folds easily, it rolls/pulls better, it accepts regular bike parts and has the 135 rear spacing. There are also claims around it offering a better ride, this is fine but I wasn't unhappy with the ride of the Bromptons I tried.
I guess I'll just have to try for a demo of a Tikit to make my mind up. I've not switched off a Brompton totally but I'd now prioritise utility, versatility and roll/pull over fold size.