The purpose of the school your going to is to learn new techniques, try and get rid of some bad ones, and improve your overall abilities over the course of the day. This isn't a Track Day, those are for playing 'safely', this is a school focusing on your improvement put on by a former AMA Professional Roadracer with a long history in the sport. I'm not ripping on Track Days, I'm saying that the focus of Track Days is to help people have fun in a 'safe' environment by restricting the proximity of how close the motorcycles are to each other on the track. This 'safety' aspect of Track Days is a direct result of the insurance companies who insure them - plain and simple, not some master plan of what causes riders to learn in the best way. If that were the case actual race organizations wouldn't let new racer's just go out and race after a 1-day 'new racer licensing school' - but that's how it is, and up until the very late 90's that's how all new racer's started racing (because there was no such thing as a 'Track Day' prior to that). I'm a very strong advocate of people not spending alot of time doing Track Days if their plan is to go racing, I've personally seen that 'safety' aspect of Track Days end up biting alot of people once they end up going racing because they 'learned' their technique in a non-racing environment. Generally what I've seen is they will get spooked or even crash during actual racing because they never experienced going as fast as they did at Track Days while being only inches away from an actual racer fighting to get in front of them at the same time.
Different tires have different profiles, carcasses, working air pressures, traction characteristics, and on and on which will all effect your bikes handling in one way or another. This is the very reason I have said so many times that if you find a tire that's working for YOU on YOUR BIKE'S CURRENT SET-UP then stick with it till it gives you a reason not to use that model tire safely anymore. When developing your abilities you want to have 'constants' thruout the experience so you know what is actually causing the results your experiencing without throwing random variables into the equation like different model tires that cause your bike to possibly handle differently. I can't emphasize enough that this isn't a Track Day, your goal isn't to go out and just have fun, it's to improve your abilities in 1 day! For that reason you should have tires that are not only in good condition, but preferably a tire that your use to cornering aggresively with.
You said you didn't want to wear down your new tires because you use them in the 'twisties' out on the street, for me I could hardly believe that I just read that! With that statement you just implied that playing on the street is far more important than actually learning something at this school and improving your abilities. I personally haven't ridden on anything other than Dunlop race tires for quite a while so I honestly have no idea which of the 2 tires your speaking about is better for the track, but if you have alot of experience on 1 of them and your bike works well for you with those tires it would be an obvious choice which I would use at the school. A predictable bike/tire combo is like gold on the race track, in my opinion that would provide you with a known 'constant' that is so important in learning. You could always buy the other tires for future use if their that good of a deal.
In the end it's entirely your call as to what you think is more important. Choose wisely, have fun, learn lot's of new stuff, and don't crash!
Question on tire wear
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