They lowered the seats in the back of the Gen 3. A tiny bit, not a huge amount and I think they also shortened the rear seat bottoms from front to rear. All of that combined with a stretched cabin will create more room but this isn't just a little bit of extra room, this is night and day difference. Even with a tall person having set the front seat back to accommodate his/her giraffe legs, there is generous space to keep your knees away from the front seat back. I'm a girly man (size Medium) so having the front seats forward to accommodate my medium height creates even more space back there. More than my class leading (of the time) ex-Gen 5 CRV.I am just quoting the specs of each car. There can't be that much difference. It's the same body as before, just stretched. You have a 24 Cx-5 correct? How about you measure from the top of your head to the roof in both cars. And from your hip to the door? According to everything I have read, the front passenger area didn't change. They added all the space to the rear seats and cargo area. The new one is very slightly wider and taller (~1/2") so it can't be significantly different. I am sure the layout makes it "seem" bigger but the passenger volume in front has to be almost identical. The total interior passenger volume is 104 cubic feet on a 25 and 106.5 cubic feet on a 26.
I don't think that I mentioned that my new Gen 3 replaced a Gen 5 CRV. Yeah, it's that good, for my needs, anyway.