C’mon guys leave him alone. dute, the reason you get those responses is because these questions have been asked many times on many different threads. The Forum is trying to get us all to search before we ask. If you do an honest search and came up with nothing, say so in your thread.
Now to answer you question. I have to agree with Bird2. There is no correlation of the gain potential between a curved cock and a straight cock.
I have a curve, which my wife and I are happy with. I went from about 6.75 to over 7.375 since early December. (why can’t I ever remember if it was 6.75 or 6.875, but it was around that area). Hope this helps.