Logic Board Replacement compatability question

To directly answer your question. they take the same heatsinks and upper case so the mounting holes will line up. They take the same LVDS/video cable so there will be no conflict there. They are interchangeable.

I highly suggest you put your money into other upgrades, such as maxing out memory or a SSD hard drive. The performance increase from these upgrades you will notice, especially increasing RAM. The difference in the processors on the 2 boards is so negligible that I doubt if you would see a full minute difference re-encoding a 2 hour movie, which is a processor intense operation. Upgrading the processor is typically the last bottle neck on a computer and it shows the least amount of gains in performance.