If one reads the OP's post carefully, he is clearly looking for opinions comparing current Ariens brand walk behind snow blowers to a Gravely walk behind tractor with a snow blower attached.
I had the same question last year when I considered buying a snow blower, either one for my 16G rider, or a new Ariens walk behind blower.
My Gravely/Ariens dealer, someone with 40 years of experiance with Gravely and Ariens products, suggested that from the middle of the line and up that the current Ariens blowers are very nice and explained that they have upgraded a number of things, including gauge of metal and other features to make them more "heavy duty".
He also indicated that given a choice he would ride on my 16G with a 48" "Ariens style" blower before he would walk behind anything - including a Gravely two wheel tractor and whatever blower you want to put on it.
This is a person I have known for 15 years and who has never steered me wrong - even if it cost him a sale.
I will openly admit I don't know a thing about snow blowers, I decided I did not need one. But in my research I found that many people speak badly about Ariens blowers, including those sold for the riders with the Gravely name on them - BUT, the people who actually own and use the 48" Gravely (Ariens) blower like them.
Some actually like the fact that they don't throw the snow into the yard of the neighbor three houses down the block and that they can actually control where the snow goes - easily.
Personally, growning up and living my whole life here in the Mid Atlantic, I don't really like the idea of a snow blower, they go too slow in light snow, we seldom get big snows, and I don't want a garage full of equipment that only sees occasional use.
So I improved the snow pushing abilty of my 16G and snow dozer - with rear wheel brakes, wheel weights on all four wheels, a "down pressure" system to increase the weight on the dozer blade, better lighting for night plowing to simply "keep ahead" of big snows, in addition to chains which I have had since day one.
This way, in a light snow I can clear my 7000 sq feet of drive and parking pad in record time - or - I can plow early and often in those few big storms - without changing back and forth from blower to blade or having to have another piece of equipment to store and care for.
I know for some of you, having another piece of equipment is what you live for, but as much as I love the GRAVELY, I have other hobbies that take up my time, money, and garage space.
I'm sure a new Ariens walk behind is not as 'rock basic indistructable" as a MA blower on a two wheeler, but I'm not sure I would use the term "junk" either.
But that's just my view, from the research I did, that concluded I had no real use for a snow blower at all. But then again I don't live in Maine or Massachusetts either.
Sheldon