I had one. I'm actually sorry I sold it. The comparison to the Kubota is tough. They are really different machines.
The Polaris is a big ATV. It is fast, fun, comfortable and can go just about anywhere that doesn't require tracks. It also can do work.
The Kubota can do a lot of work, and can get you places you most places you need to go. I don't think its as comfortable or as capable on extreme terrain.
IMHO Polaris is fun first, work second. Kubota is work first, fun second.
I know I'm going to get blasted (this forum seems very heavily RTV biased) but I think the Polaris 6x6 can go places the RTV can not go. I also think its more stable on hills. It's hard to beat a third axel and set of wheels when you need that extra couple inches of wheelbase or side stability.
I replaced my 6x6 with another Polaris (4x4 professional series). I went Polaris over Kubota primarily because it can seat three adults in comfort and is more fun. If you are buying a 6x6 to cross tough terrain, go for it. If you are buying it to do chores around the house understand that its turning radius is big, and it will tear up the grass.
My wife misses the stability of the 6x6, but I like the agility of the 4x4.
My tractor dealer (I also have a
B2410) says Kubota has had a lot of comments regarding the lack of a full width (3 place) seat. Hopefully they will address this in the future. If they do I'll try to convince my wife we need two UTV's.
As to price, I think the Kubota is more expensive than the Polaris, and it should be. The polaris has a gas ATV engine. The Kubota a diesel tractor engine. Kubota HST, Polaris belt drive transmission. Kubota is much more involved and detailed machine and should be priced higher. In fact I think there should be a bigger differential than there is.
If you are looking at Polaris, don't pay list. Get quotes from all your local dealers. I found substantial price discounting when I bought my second machine. You have to ask, and may have to travel. I saved about $2,000 off list, but had to go about 120 miles.
Feel free to PM me if you have any specific questions.
John