having played with 960012's bachmann 08 (and seen the hornby 08) I have come to the conclusion that I would prefer the Bachmann one. I think (this is just my opinion) that the hornby one looks fragile and weaker compared to the Bachmann. The Bachmann really feels weighty when shunting (it actually rolls to a stop when you shut off, something you must remember when shunting) and the coupling rods look "right" even if the Hornby ones are scale. I just think the Bachmann one has more weight and presence, somthing the Hornby lacks. I haven't run the Hornby one yet so won't comment, but for appearence the Bachmann one does it for me.
However I want to find the roco one, as its HO scale and can become a Swedish V class simply through a repaint!