Well another snow season is approaching and I wont be mounting any plows to the tractors this year. I found the atv to be more than adequate for the task. The atv with AWD hands down has more tractive force than any of my GT's, allowing me to plow up slopes or get into unplowed snow with little concern of getting stuck and without any traction enhancements like weights or chains, I can only imagine an atv with chains and/or wheel weight would be near unstopable. The atv is flat out faster at getting the job done, the GT is limited ground speed wise particularly in reverse where as the atv is not. The atv does just as good a job as the GT as far as cleaning the surfaces and stacking snow when necessary.
A few areas that I found the atv to be lacking when compared to the GT, The atv is slightly larger in size than the GT, and doesn't have the turn radius that the GT has, so if you do a lot of tight areas this is going to be a big negative, I don't have many tight areas to deal with so this is of no concern to me. The plow unit I have is not as nice to use as the Wheelhorse unit and this is because I need to get off the atv to change the blade angle, whereas the WH unit has a control for angling the blade from the seat, this is a resolvable situation and I hope to get to this project before I need to use the setup this year. I prefer the hyd lift of the GT over the winch cable lift of the atv, although the winch setup is adequate I find the hyd setup to be smoother, easier to control and more durable, I'm still on the fence as to whether I want/need to switch to hyd lift. I have accumulated most of the necessary components to add hyd lift and angle should I decide to go that route.
I have also been accumulating things to build a snowblower to be prepared for the big dumpers we can get although this is not a project on the front burner. The unit when built should be 50+ inch width to cover an atv track, be self powered with electric start and have lift, chute and deflector adjustments from the seat. I pretty much want a cab to use with a blower so a few projects to post in the future.
All in all the atv's work out better than a GT for my uses, they are pretty versatile and can be adapted to many tasks if needed, and the entire family enjoys using them for work and play.