Some UV workflow questions

Isiktor

I am working on an creature for a my final project in school and I am wondering about transposing my model after making my "t-pose" UV's. 

If I transpose it, I dont have to redo the UV's right? 
I brought over my model to substance painter in its t-pose and then went back and transpose my original model in zbrush. Would I have to bring over my new transpose model to substance painter or would my paint/texture map paste to my transpose model in like marmoset? 

There are other question I think but cant think of them right now. 
If you need clarification on my questions, just ask

Thank you

Sunray

No, you can keep the same uvs but for renders I prefer to pose before rendering since it's more fun to me to texture it posed. And you will always get a bit of distortion.

Isiktor

so I can bring over my texture map from my t-pose creature to my transpose creature and it will work?
Obviously there will be some distortion