I recently purchased apple of discord, and then 5 minutes later got it from a decrypted engram. Both have head seeker and both have hand laid stock for increased stability. The part that makes it difficult in picking which one to upgrade would be the full-auto and unflinching perks. Full auto is advantageous in that I don't need to remove my finger from the trigger. However, if I get in a gun battle, unflinching would help me land those head shots if I'm getting hit. Any advice?