I posted a link to a $179 (3) base 690 kit two days ago in this very thread.
I'm not trying to break 'em off on you. I don't have any experience with the 618, so I was curious. However, I can't tell the difference between my 2 1/4 HP routers and my 1 1/2 HP 690's in handheld use.
Variable speed is one difference I hadn't noticed, but I use that a lot more on the bigger routers in tables than I do for handheld operations.