From memory, the default RiscOS was kinda flat looking, but there was some application you could run that added a theme to it that made it more like the screenshot. This would have been in the mid-90s ('96 or so) when I was using them.

I do remember if you ended up in a mode that wasn't running that theme and got the default, it felt pretty old and boring, but the theme jazzed it up quite a lot. Can't remember the specifics about it though.