I have a Concours C14 and a Busa.
The Connie is a more technically advanced bike. Dollar for dollar it is one of the best bikes on the market, for it's features. IMO.
It has ABS and traction control. An electric adjustable windscreen. Tire pressure monitors. Heated grips. Removable saddlebags are standard.
It has (basically) a detuned ZX14 motor. Sure it's not as fast as a Busa but it's no slow poke either and will keep up with most any bike 99% of the time during normal riding.
You sit a little forward on a stock Connie. Many guys add risers or change the handlebars out and then it's almost a straight sit up bike depending on your dimensions.
If you put crash bars on a Connie you can also add foot pegs to stretch your legs out. Something I have never seen on a Busa. Because that would be
Every bike probably has a up side and a down side right? There is no perfect bike for everyone - if there was we would all own it.
Now the down sides to a Connie -
The Connie is top heavy and weighs about 150-175 lbs more than a Busa. Slow maneuvers require extra attention to prevent a tip over. No I haven't tipped mine over.
Once going over 5 mph the weight disappears for the most part and is not a problem.
The linked breaks take some getting used too. Cruise control is NOT standard but can be added if desired.
The Concours is a Sport Touring bike. I can ride the Concours much farther then the Busa - Mostly because of Cruise and more upright seating and a taller windscreen etc.
I like my Busa just fine - that's why I didn't get rid of it. But the Concours has earned a place in my garage too.
Search Youtube for Concours test rides and you will get a pretty good idea why there are a number of us that have a Busa and a Connie or some just a Connie now.
If you want any other info just ask.