The reaction is to threads like This (link)
. Yes, we see them often. I still think your two choices are very bad choices. There are many bikes to choose from that fall in between a 250 and a 600-750 Supersport. Just because you haven't run into any sticky situations as of yet doesn't mean you won't. As you are reading through some of the other posts, you will see the experienced riders, time and time and time and time and time again, explain in great detail that just because you don't stunt or drive fast really doesn't mean shit. Situations WILL arise, despite your best efforts, that will require certain reactions from you. As the bikes become faster, those reactions have to be much more precise. By the time you have hit a 600cc Supersport, you are already on a bike that will throw you to the ground so fast you won't know what happened when certain situations come up. Smaller (and different class) bikes will react much different and much more forgiving.
For example... You are pulling out off a side street. You accidentally give it too much throttle, and your back end slides a bit. Regardless of how "mature" of a rider you are and the fact that you don't "speed or stunt", as a new rider, your reaction will most likely be to jab the throttle shut. Congratulations... you made the wrong decision. The bike catches traction and you highside. You are now laying in the road 30' in front of your bike right in the middle of a busy road. And it all happened when you were traveling less than 10 mph.
If you had started on a bike that didn't break traction so easily, you would have had enough time to learn better throttle control and been much more comfortable with how the bike reacts to over-throttle. By the time the next season rolls around and you step up to a 600cc supersport, you have a better understanding of things like this. But since you skipped the first step, you are now 1 in 10 riders who is scared shitless of their bike.
That is just one of about 100 scenarios. And it WILL happen at some point. It always does. Always.
But since you have already made up your mind...
Aside from the fact that the R6 will be the slower of the two, and probably most recommended for that reason, it would all boil down to comfort and looks. Personally, I like the R6 better than any of the Gixxers I have ever ridden... except for the fact that you have to wind it out pretty good to get to the power. But then again, I'm just not comfortable comparing power differences of two supersport bikes with a new rider, so I won't go any further on that.
I am also a huge fan of Yamis quad projection headlights. I think they look sweet as hell.
My suggestion to you is to [very carefully] read through the new rider posts. Take 5 minutes and think VERY hard about your decisions. It's fine if you don't want a 250. There are still 500cc bikes and 600cc bikes both that are not supersports. They are fast enough to be fun, and it will take you quite a while before you can even ride at 80% of the bikes capability.
And for future reference, if you don't want negative responses about your lack of riding experience vs the very fast bikes you are looking at... post in "daily rider" or the manufacturer specific forums... not "new rider".