Which GTX 780 versions are comparable to a stock 780 ti?

[Arishok N7]

I've done a little research and I've only been able to find so much. I know an OC'ed 780 is not far behind the stock 780 ti. But what about the other 780 versions? I'm not a fan of OC'ing and typically just keep the card stock out of the box. What are some of the top 780's out there?

 

[Arishok N7]

My next upgrade will most likely be the CPU. The 6700k is a nice one.