The only factor you need to consider is portability vs. screen size. You can get the 13" version with 16GB, and for most kinds of coding the other performance d

The only factor you need to consider is portability vs. screen size. You can get the 13" version with 16GB, and for most kinds of coding the other performance differences don't matter. I just switched from a 17" Macbook Pro to a 13" Macbook Pro. I miss the humongous screen when diffing files, but I just love how portable my 13" is! I don't travel much, but lugging that 17" machine around was such a pain... I guess the 15" isn't as bad as the 17", but since you do plan on carrying it around I'd recommend to go with the more portable option.