Difference between MCOR 1 and MCOR 2

[waterfalling]

I am trying to find out the difference between an MCOR 1 (MCOR) and and MCOR 2 (MCOR II). I have an MCOR off a 2008 CC Precedent Electric 48V, and it says "MCOR II CCI 15302" on the label. The box looks exactly like the other boxes that identify with part # 102528501, but most of these threads reference as "MCOR" or "original MCOR" implying this is an MCOR 1. So my question - is an MCOR II P/N 15302 the same as an MCOR P/N 102528501"?