[Celtic Conservative]

Is this an all-up design or a technology demonstrator?

CC

[ThunderSleeps]

They're calling it a prototype, not a technology demonstrator so I would expect it is fairly close to the final design.

Lots of straight edges, sharp corners and discontinuities - at least towards the rear of the aircraft. Lots of things to generate radar returns. I'd hazard a guess it is not intended to be stealthy from all aspect angles. Much like the F-35, probably only "stealthy" from the forward aspect.