Owning both for over a year, my decision tree for using either the BMW i3-REx or Prius Prime looks like this: +100 mile trip - Prius Prime due to superior gasoline highway mileage and range, +56 MPG Prime and 600 mile gas segments vs. 40 MPG and 75 mile gas segments BMW i3-REx. +50F and 3 stop trip - Prius Prime due to more efficient EV operation but cold weather induces unplanned engine operation. -50F or +3 stop trip - BMW I3-REx because it does not have the cold induced engine operation and three times the EV range of the Prime. Either car works and can backup the other. If I had to choose, the Prius due to reliability, TSS-P, and long range legs. In this case, the Consumer Reports score is accurate: 77 - Prius Prime 66 - BMW i3-REx Bob Wilson
