I like them both. IronMaiden like, with some rock band I cannot remember.
Mixing - I would like to hear more drums (
bass drum at the very least). It sounded like a drum machine was being used. The keyboard could also be lowered in the mix, and I couldn't hear the bass guitar, if there was one.
Song - One thing I didn't like too much were the abrupt changes in tempo, without warning (no buildup or down). The end of epidemic was cool.