This is just from observation my teammate has a challenge drilled similar the challenge is 3000 & enigma is 1500 I was able to play multiple angles and in oil without losing carry, where the enigma was smooth off spot the challenge showed more over n under and his carry suffered when he moved in the enigma reminds me of a stronger ransom demand if that helps. They prob could complement each other, I'm not expert but I think challenge goes a lil longer it being a pearl