Frank and Jen: Old vs New

So I stumbled across some of my old stuff again and was quite shocked at these character's outdated appearances. Their attires are still the same for the most part, but things like the color scheme and overall drawing quality are drastically different

Frank:
Mech Cops III (this one drawn in 2007) vs AatR2 Round 5 (2012)

Jen:
Sniper Rifle Tutorial (2010) vs AatR2 Round 5 (2012)