The Boost is definitely a lot more work to ride and Ive switched back and forth a few times in different conditions. My buddy rides a 146 9R with the 2.6 track, I have a 155 Boost with the 2.75, both 2024 khaos. When the snow is crusty or crappy we both can ride 9R without breaking a sweat nomater what the terrain. It wheelies without effort but hooks up just enough and has the track speed to get around in the steep trees. The other day we were riding somewhat tight old growth and we both agreed the boost sucks on the crusty snow and just holding and edge was harder while the 9r just cruised through it no problem. Everytime we switched the guy on the boost would be nearly winded while the guy on the 9r wouldnt even be working. When the snow gets above the knees the boost does circles around the short track 9r with half the effort and I prefer the fun factor even just messing around on flats and smaller hills when it gets crazy deep like we had a few weeks ago. The Boost can bowtie and re entry in a crazier fashion but the snow has to be good otherwise it gets ugly for novice rider like me.
For low elevation riding in Oregon at 5k to 7k and the typical cascade concrete the 9R is hard to beat.
When I ride Tahoe area and have to make some bigger climbs up at 8 to 10k in elevation to get out of nasty zones the boost makes me glad I took it over the 9R though. The Boost feels almost indentical at 5k as 10k while the 9R definitely looses a good amount of its kick. The only thing im starting to regret getting the 2.75 track if the 3.25 handles decently on the crappy west coast snow we have.
My buddy and I both agree the only solution is to stop being broke and each have a 146 9R and a 155 boost. Who needs to buy a house anyways.