The Spigen feels smoother around the back edge, less sticky overall, and shows fewer fingerprints. Its camera control button is slightly easier to press and more responsive to swipes. It also has stronger MagSafe magnets. It’s not loads better, but the differences do add up (for me). YMMVI have the Lumen right now and don’t mind it. What are the main positives you see with the Spigen over the Lumen?
I’ve noticed a little bit of dust on the back of the case but don’t mind. Enjoying the fit, buttons, and look.
Enjoy your case!