Actually Project Blue has much more scripting expansions than fenix mod. They are both mods focused on scripting ability and they are both exellent mods but Ply's Mod (PB's father if you will) has been around alot longer and Plystire is a genius coder so Project Blue has alot more scripting capabilities.
EDIT: Iron sights, gun lag, blood particles, etc. are all part of Airmod, an open source mod. Airmod is incorporated into PBUM
and fenix so yes they both have the same blood particles, iron sights, etc.
dark peanut
current projects: a game about a guy