*Opinion*
I do not think you would have to have separate grow areas as long as the one area is in compliance with both laws.
Check me if I am wrong, but medical grows do not need to be locked, 64 grows do.
If you lock your med grow, you should be in compliance with 64.
Since the passing of 64 my plant count doubled. (6 for me, 6 for my wife).
I will only have 4 mature flowering plants now (veg room is now a fem seed crop room)
But I want to be in compliance with 64. I put a $2 lock on the door. as far as I can tell I am in compliance.
I would check with a lawyer instead of a bunch of stoners on the interweb.
I bet you could call a police station and ask them. That actually sounds like fun.
"Hey officer, yeah, I have a question about growing marijuana. I have huge weed plants in my basement. I'm going to harvest them, cure them and smoke huge fatties. But I want to be in compliance with the law. You should try smoking weed, it is great..."
*Opinion of a stoner*