M5 Air or Boosted Board?

[meowmeowmeow]

So I live in NYC, and I've been looking for a reliable and convenient transportation that would take me from/to work, which is 4 miles away.

I am looking at the Ecoreco M5 Air ($1250) and the Boosted Board 2.0 Dual+ ($1600). Any suggestions on why one would be better than the other?

Thanks!