When you upgrade an artefact to the next available level, do you pay the price listed or the difference between the two? Bows, for example:
Ranger's Bow: 250 credits ( 7% faster) - Shooting: +100 credits
Velocity Bow: 550 credits (14% faster) - Shooting: +250 credits
Lupine Bow: 1000 credits (22% faster) - Shooting: +500 credits
Answers
(Might have to message Tecton if you have shooting and you want to upgrade, had a few people complain they get quoted the non-shooting class price)