Mower questions, email contact

Two issues: I will almost undoubtedly be buying a self propelled mower.  What are the arguments between the LM2102SP at $549 and the steel-decked, brush-less motor  LM2022SP at $749?? I mean, it is clear what the two big differences are: steel deck and brush-less.  My question is: Are these two factors worth another $200?

Secondly, I wish that EGO had a direct email contact line where questions such as this could be submitted directly rather than through a "user forum".  Phone numbers are listed, but no email contact.