Playing catch-up on this thread....
I don't have an OF-1010 to compare the MFK-700 to. I'm dead certain I'd like the 1010 especially when you use the accessories to put it on its side much like the 700 with the horizontal base.
I got the 700 on a decent eBay score. I use it a lot for flushing on a project or simple edge treatments. Certain the 1010 would do those as well. With the hose on the 700, it is literally dust free, which I like.
Using the 700 on the guide rail is a bit hokey, but it works. In a pinch, two 5x30 Dominos double-stick taped to the bottom of the 700 with the other edge on the guide rail works just fine. I've since made a skate out of scrap and a T-bolt. Then I hid it somewhere so nobody would take it and I can't remember where
The comment about the table widener on the 1400 and guide rail use... with the table widener, you use the router flat on the work surface and put the router on the -outside- of the guiderail (side without the rubber strip). The nice part is it sits flat on the table and can be guided without the use of the foot, which I find awkward. That's really the only time I use the table widener because: a] the 1400 won't fit in the Systainer with the widened base attached and, b] I always use the guide rods and one of the guide stops to make an outboard handle nearly 12" away from the router when I want to add stability (like edge trimming/profiling)... it is ridiculously better than the table widener and I think the guide stops are a required accessory anyway.