mean /min/ noun [ S ] METHOD
2. formal a quality or way of doing something which is in the middle of two completely different qualities or ways of doing something
We need to find a mean between exam questions which are too difficult and those which are too easy.
resort /r?z?t/ /-z?rt/ noun ACTION
2. [ U ] when you have to do something because there is no other way of achieving something
He got hold of the money legally, without resort to violence.
以上参考剑桥高阶词典
从释义上看是分别的，mean指的是你的手段介于两种完全不同方法中间的意思，看例句应该能明白。
而resort则指唯一的手段