You're the first user in this group to own both. We would appreciate if you tease out more detail on ride characteristics. Like suspension performance and transparency, sag and shock turning (do you have a Vivid?), steering and lean-in, climbing, descending, stack/riser config, etc. Most of the folks here are coming from a Voima, so we are very interested in the effective and qualitative differences here. Since you are going from a K2 to a K2, its bit like dropping a size, so that alone would produce a marked difference in agility, so also looking for similar qualities as well.
Sure, I can tell more about differences. Please know that I am not any professional and my plan is to just have fun
In Finland we currently have lots of snow and ice, so traction is a bit different than summertime even with the spikes. I have now riden only little bit over 100km, snowboarding is taking my time as well
My plan was to updrade Voima to Sonni. First I was looking for frameset, but I noticed that a difference to the basic conf Sonni was so small that there was no sense, so I ordered Sonni with deluxe ultimate, zeb select, sram gx etc.
I sold my Voima with basic conf and left Hope brakes, cane creek coil, Charger3 damper, sram asx etc. to my shelf waiting for bikepark opening. I also have extra 29" e-deemax set with spike tires.
About questions: I Need more riding and summertime for deeper analyse, but here is some thoughts. I have tried demo-Sonnin in the bike park as well so I have some ideas.
- Ride characteristics: Sonni is a bit smaller. I am 172cm and I used to have K1 Evolink before Voima, which felt a bit small for me as I am an old MX/Enduro rider. K2 Voima felt so much better, but now when Sonni in a bit smaller, it feels to be perfect for me.
Sonni is more agile, easier to wheelie (very important

). 29" Sonni turns better than mullet Voima, but it might be size thing. Sonni feels a bit lighter as well.
- Suspension performance and tuning: I think rear link is more progressive. I have 190/200 conf and it goes so nice and smooth, but does not bottom in big jumps. I just tuned setup via trailhead. But as I told at beginning, winter is a bit different. Super deluxe ultimate have different setup than in Voima, but kitsuma coil should fit.
- Steering and lean-in: I think Sonni turns better with 29" rear wheel than mullet Voima. I have not riden mullet Sonni yet. Lean-in is difficult to say because of winter conditions.
- Climbing: Sonni climbs as well as all Pole's. If compared to Voima, I think Voima climb better (because it is longer), but I really can not feel the difference.
- During Demo session in the bike park as fall, I first took a Sonni with lower ricer with higher bar. I almost cancel my Sonni order, because my Voima felt so much better. Then I took another demo bike with similar conf as my Voima was (standard) and I was just smiling
- about battery: Someone might think it is annoying to remove battery every time when charging. Because of keyless removal, it is actually really good. You can easily remove the battery, put in in a charger and maintenance lighter bike.
More onformation will follow after more kilometers. Feel free to ask if any specific questions.