For those wondering how it compares to the 2015, 2014, and 2013 13" MacBook's with i5. Just note the 2015 Benchmark was with 16GB RAM.
2016 13" MacBook Pro with i5: Single Core 3457 and Multicore 6896.
http://browser.primatelabs.com/v4/cpu/873092
2015 13" MacBook Pro Retina with i5: Single Core 3860 and Multicore 7287.
https://browser.primatelabs.com/v4/cpu/872594
2014 13" MacBook Pro Retina with i5: Single Core 3481 and Multicore 6617.
https://browser.primatelabs.com/v4/cpu/871504
2013 13" MacBook Pro Retina with i5: Single Core 3523 and Multicore 6733.
https://browser.primatelabs.com/v4/cpu/869851
(Edit) Added links in case I grabbed the wrong PC's somebody can correct me. :<
Taking the daughter to Apple tomorrow. She insists she wants the 13" one but also does movies. Her previous 2011 was dog slow. If the 13" is good enough for her I'm fine with that, but a loaded up 256GB 13" is only like $200 under the base 15" (talking with toolbar). Not sure what to do.
check the benchmarks quoted above for the base 13", and then look up whatever CPU there is in the 2011 model you're currently using. Also consider if the 2011 model had a HDD or SSD which will make a big difference.
The ones with discrete GPUs will have faster encodes/exports if you do a ton of video work, but for general use you may not care. You say its 'only' $200 between the top 13" and the base 15" - but how much between the base 13" and the base 15"? If you're already spec-creeping on the 13" just go for the larger one, especially if you can afford it, which 'only' does suggest