What is the difference between the HP Designjet T630 36" and HP Designjet T650 36" printers?

Question

Printers

What is the difference between these printers, the price differs by about a third, and the characteristics seem to be identical

Answer 1

T650 is slightly faster. 76 A1 prints per hour versus 82 A1 prints per hour
Other than that, there really doesn't seem to be any difference.
Maybe the resource is different, but there is no word about it.