Thanks for the detailed info.8/256. The 2014 is just a slight clock speed bump (and only on the i5) over the 2013. You'll notice the benefits of double the RAM a lot more than you will an extra 100MHz.
Couldn't have put it better myself, though there's the added benefit of a 256GB SSD vs. a 128GB as well! And either will happily run newer versions of macOS using the OpenCore Legacy Patcher should the OP wish to go that route.8/256. The 2014 is just a slight clock speed bump (and only on the i5) over the 2013. You'll notice the benefits of double the RAM a lot more than you will an extra 100MHz.