<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Frankly I'm suprised you found the 700 and 900 different and the 700 more like the 200 as I was under the distinct impression that the exact opposite should be the case, the 700 and 900 share a different cabin design from the 200 with a lower floor and higher windows, supposed to make it feel roomier, especially at the shoulders. I guess it shows to go you the difference that cabin fitout makes. I also therefore caution not to expect the cabin you saw in the jungle jet to still be like that when AC gets finished with their fitout design.</font>
The 700 and 900 probably are the same, at least in terms of the fuselage shell. But the 900 was fitted out with larger lavs, a business class section and upscale seats. The 700 was fitted out as AC would be, with the possible exception of the addition of a business class section.
Bombardier also made much of the "improved roominess" or at least the appearance thereof. But if you cram a 6' person into a 5' space, and then "increase" the space to 5'1" or even 5'1.5", you're still stuck in a claustraphobic sardine can.
Frankly, short of 1 across BA sleeper seats, these planes are a disaster. Business class would make the tolerable, but only in the way a 767-200 or BAe146 does. It would be more like a UA E+ seat.
A symphony of a mess, in fact.
As for the jungle jet, no matter what seats they put in, there will be more room per seat than any other model under consideration -- even the A318.