For people on budget (like me) this Retina Early 2013 15” is still an absolute monster : r/macbookpro
Retina, round two: Apple's 15-inch 2013 Retina MacBook Pro reviewed | Ars Technica
Identify your MacBook Pro model - Apple Support
Apple MacBook Pro 13-Inch Early 2015 | Intel Core i5-5287U @2.9GHz 8GB 500GB SSD | eBay
Apple MacBook Pro 13 Retina, Late 2013, A1502, i5 2.4 GHz, ...
13" MacBook Pro Retina vs 15" Retina MacBook Pro (2015) Comparison - Laptop Comparisons by MobileTechReview
APPLE MACBOOK PRO 13 INCH RETINA 2015 UNBOXING and COMPARISON DEMO 4k 2160P - YouTube
MacBook Pro vs. MacBook Air
Early 2015 MacBook Pro Retina 13 vs Late 2013 MacBook Pro Retina 13 - YouTube
Apple MacBook Pro (Retina 13-inch Late 2013) 2.4GHz Dual-Core i5, 4GB, 128GB SSD | eBay
2015 MacBook Pro with Retina Display: 15-inch vs. 13-inch
MacBook Pro with Retina display review (13-inch, 2015) | Engadget
2015 MacBook Pro with Retina Display vs. 2015 MacBook Air
Mildly Interesting: New Late 2013 MacBook Pro Top Case Has Plastics Matching Newer MacBook Models, Improved Trackpad Alignment : r/apple
New MacBook Pro vs older MacBook Pro - 9to5Mac
15" Macbook Pro with Retina Display 2.3GHz Late 2013 vs 13" Macbook Pro with Retina 2.4GHz Late 2013 - YouTube
Apple MacBook Pro 15-inch 2016 compared to the 2015 model: Here's what has changed | Technology News - The Indian Express
MacBook Pro (2015) vs MacBook Pro (2014): Is it time to upgrade? | Trusted Reviews
Differences Between Late 2013/Mid-2014 Retina MacBook Pro: EveryMac.com
Amazon.com: NinjaBatt Battery A1502 A1582 for Apple MacBook Pro Retina 13” A1493 [Early 2015 Mid 2014 Late 2013] - Long Lasting [71.8Wh/11.43V] : Electronics