Great replies thanks everyone. Sounds like both will be great options.
I am tall so looking at a 58cm frame for the aspero so not much difference in BB drop.
3T have paused UK shipments from what I can see so I don’t think an Exploro is an easily available option.
I went into a fancy LBS today and checked out the Aspero 5 in the flesh. They didn’t have a standard model. Purple sunset colour which is cool and is the colour I would go for but I worry it will date quickly. Given that both bikes are pretty close, things like aesthetics matter!
Does anyone have any idea if OPEN might be refreshing the UP any time soon? Would be kinda annoying to buy now and a new frame come out soon.