Can the latest 13" dual core (i5? i7?) 16 GB RAM 1 TB SSD touch pad rMBPs perform similarly to my mid 2014 15" quad core 2.5 Ghz i7 16 GB RAM 1 TB SSD (dGPU) rMBP? I'm attracted to the new 13"'s portability--seems drastically more compact than my 15". But, are there any things my aging computer will do that the 13" can't handle? I'm mainly concerned with 1. my relatively large photos library (40k photos) and itunes library (10k songs), 2. my tendency to just do lots of stuff at once--lots (and I mean lots) of research/work related tabs in safari, lots of word documents (including composing 200 pg+ docs with lots of difficult/high res figures/photos), Photos app, itunes, numerous bibliographic management programs (endnote, mendeley, papers, etc), skype open at once--and finally 3. with the performance of ABBYY Finereader OCRing 100+ page 200+MB documents (which seems to take my 15" quite some time, even with 4 cores at 100%) My instinct says that if I can compromise with the OCRing, the rest will be the same. What's your take? Will going down to 2 cores simply double the time required for tasks like that, or is the relation more complex? How will the dual core limit me in relation to my current machine? For someone like me, can the 13" be a 15" replacement?