I have not used Winny before but I don't see how it will help with cutting. If you have a clean diet and do cardio you will cut up and the Winny should give you a very hard appearance while maintaining LBM. I can't say from personal expirience though.
Sorry guys I screwed up posting it was supposed to be 300 test prop/wk. The reason I chose fina and winny was because of less water retention and harden muscle.