gdp only defend the defense to best of the team ability to do so .. you can win if they are slacking with few thing. , but the better balanced team will always .
does inside gdp defend outside... yes and no. depends on the foe and your team... you can lose from the outside if the team is balanced. nothing is taken away from the team outside game if they actually have that ability, it just will be harder to score inside. to defend his jumpers this will depend I guess gs/stamina. od im gueesing..
this goes for vice versa with outside gdp.