Description for the MacBook Air 2013 to 2015 battery says: "Replacement battery compatible with all 1.3 or 1.7 GHz (Mid 2013), 1.4 or 1.7 GHz (Early 2014), and 1.6 GHz or 2.2 GHz (Early 2015) 13" MacBook Airs, and backward compatible with 1.8 or 2.0 GHz (Mid 2012) 13" MacBook Airs. This is an Apple original (OEM) battery. " so... if the first battery is compatible for 2010 to 2015 models, and annother is compatible to 2013 to 2015 models, then I'd apply thee fundamental mathematical theorem, stating if A = C and B = C then A = B :-) *jm*
the description of the 2013-battery states: "Replacement battery compatible with all 1.3 or 1.7 GHz (Mid 2013), 1.4 or 1.7 GHz (Early 2014), and 1.6 GHz or 2.2 GHz (Early 2015) 13" MacBook Airs, and backward compatible with 1.8 or 2.0 GHz (Mid 2012) 13" MacBook Air." and that says is all.