11mm difference. 11mm.
And also a much larger wheel to rotate around and find them balance spot.
I am convinced, ever tried a full downhill bouncer with a ridiculously long chain stay compared to one with a nice short one? It's the difference between making certain jumps relatively easy and fun and turning them into a complete chore - and also turning manuals into a chore. It's the combination of the 180mm to 200mm of travel and that long chainstay that does it.
It all adds up as well, when your constantly trying to lift your bike around on a 5-10 minute downhill run do you really want to become even more fatigued by the extra weight of pedaling, the extra effort put into correcting jumps where you stray offline, the extra effort that you have to put into manualing due to the CS and wheel size.
Then theres the fact that smaller riders are more affected by these things than others, do you think an average height rider is going to be able to ride a 29er downhill bike as well as a 6 foot 5 rider could?
Are they going to produce two sets of Boxxers, one 29 and one 26 for different height riders and bump prices up even further? Upside down forks are the answer you'll say! Because those have worked really well so far! DVO might manage to make a USD fork work for pedal bikes I guess, might being the emphasis. Even then they'd have to ship with different optional internals to alter travel etc.
Lots of work for **** all gain.