Pose for pose there always is a lot of opinion involved, but IMO:
fdb
Kai. Better lats, chest, legs. Even arms looks better than Phil's which are somewhat flat.
fls
Kai. Better lats, width and overal stance.
side chest
Kai, on arms, legs. Phils chest looks good here though.
bdb
Very close but Kai better shape and condition on legs and overall conditioning. Better calfs.
rls
Close in the back, Phil looks sharper but I prefer width in rls-poses. Legs just goes to Kai again.
side tri
Phil. Looks bigger and thicker in the arms department. Also better chest depth from the side.
absn'thighs
Kai no contest. Better everything. Phils stomach looks worse than ever.
mm
Feel like just giving this one to Phil since it's close but to be honest I think Kai's looks more peeled and wider in the most muscular. Displays his leg striations better too.
Kai again.