Diki, you already know that the "G series" has been designed for and sold (with the brief exception of the G70) in the MI stores..
The "E series have been designed and sold through the Home piano stores...

Both the G70 and E80 are the current/ latest offerings with in the two divisions...The E80 did not replace the G70...and actually the E80 was stopped production wise before the G70 in the USA market..