Mostly just bling IMO. They say it reduces rolling resistance but I've never noticed. My Alpha with the 10" wheels does back up in pow pretty well though so maybe some improvement in reversing. That's for when I run out of talent and nearly kiss a tree but hammer the brakes just barely in time and have a ski on each side lol. Or my superior route finding skills lead to me a wall of trees with no outlet.
Every bit helps the alpha has the least resistance and puts that 800 power down competitively. We can push cold sleds off the deck and the cat rolls down others not so much. A circle rolls better then a oval
Blang blang, can run the track a little looser def dont rachet like the other g5s it does roll easier but its a pricey option i went 9s on my g5 brother running 10s on his cat
I went to a big wheel kit specifically for 2 things. First as said earlier, it makes the sled back up better in the powder. Secondly I was having an issue with some tracks that bulged really bad at the rear wheels and actually had 2 replaced under warranty due to splitting. The big wheels will distribute the forces more evenly. And yes the tracks turn easier but you probably won't feel that when riding.