I'll try to super-simplify it:
2011-2012 Leaf: poor heater, slow onboard charger in all cars.
2013-2015 Leaf: heatpump in all but the S, faster onboard charger in all but the S without Charge Package. The S has resistance heat only for all years, but it's a better heater than the Gen 1.0 cars. (2013 Leafs built before April of that year have the older, fast-degrading battery.)
In 2016 all the SV and SL cars have the 30kwh pack, while the S got the same pack about August.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.