Damnit, the naming theme is cats?
I thought they picked Bobcat to contrast with their Bulldozer line (I don't know if this brand is common in the UK, but in the US, "Bobcat" is a brand of golf-cart sized mini-bulldozers, and it's common to refer to any mini-bulldozer like that as a bobcat).
What a bummer. Though I guess there wasn't a ready name for something that's like a piledriver only smaller anyway...