Ok, I got curious and went and looked myself.
The article does a good job of describing the smallest modern Yanmar but to me it looks like it was written by a website editor who hopes Yanmar will pay him some advertising dollars, instead of someone who has experience operating equipment like this. 'Beefed up garden tractor" ??? It looks to me to be more of an equivalent to a Kubota BX - a very small real tractor.