I got a Carrier heat pump installed last year that was supposed to be a 2 ton unit (for downstairs). I just got another Carrier heat pump that is supposed to be 3 tons (for upstairs) but it is shorter than the 2 ton unit (same width and depth on both).

2 ton unit: model # 25HNA624A300
3 ton unit: model # 25HNA636A300

Can a 3 ton unit be smaller than a 2 ton unit???