The depth and breadth of code will be a personal taste sort of thing. Iron Maiden is way deeper and has a lot more stuff to see and do. Deadpool is very straightforward and simple. One thing that's not subjective though...the shots on Iron Maiden actually work. Deadpool is a geometry has geometry misfires and lots of clean shots don't land reliably.
Deadpool is still more of a work in progress, but I think if you fast forward a few years, Iron Maiden will still be celebrated while Deadpool will be a game that has lost its shine and is just "okay for a few plays."
I actually like the code on Deadpool. Not every game has to be a journey. I just can't get over the dodgy nature of the game's shots.