Borderlands, the only game in which a higher quality item (purple) is worse than a lower quality (blue) one.

Seriously, assault rifle. Both made by Dahl, both require level 25, but the blue one has slightly higher damage and double the fire rate.

HLK320 U URBAN COBRA (purple)
Damage 110
Accuracy 94.6
Fire rate 7.7
1.4x zoom
+42% Recoil Reduction
+50% Accuracy
18 ammo 

AR30 GENOCIDE COBRA (blue)
Damage 116
Accuracy 94.3
Fire rate 15
1.4x zoom
+63% Recoil Reduction
+48% Accuracy
12 ammo

Borderlands