It's actually common to have 2 seperate guys that you play at SF dependent on the opposition.
One would typically be good outside if you play motion, and the other inside guy would be played if you wanted to play look inside. The same is also true if you're more interested in defending them optimally.
I otfen find teams go run'n'gun 2-3 zone to strenghen thier weak area (inside) this would be the perfect time however, to play your ouside focused SF, you can defend outside better (r'n'g) and you can attack outisde against thier 2-3 zone.
SG can be for outside choice PF for the inside. Mix and match and keep your opponent guessing.