Curious Integrals

Calculus Level 2

If $A=\int _{ 0 }^{ 1 }{ { \left( 1-{ x }^{ 1/p } \right) }^{ q } } dx$ and $B=\int _{ 0 }^{ 1 }{ { \left( 1-{ x }^{ 1/q } \right) }^{ p} } dx,$ for $p > 0$ and $q > 0$ , what is the value of $A - B?$