Since the keycap is hand polishing, the corner and some edges are possible to be less polished or over-polished. However, the team is trying its best to improve the polishing technique.
Colour Differences. The keycap is hand-painted. The line part may be over-painted or colour-disconnected when polishing. It is a normal situation for hand-made keycaps. Moreover, the colour is man-mixed. Therefore, different baches of Keycaps are possible differences in colour.