Wait until you change the plugs or do any other major work on the 14....
The 14 and its predesesor, the 12R are difficult bikes to do major maintanence on. The frame runs over the top of the motor, making it very difficult to change plugs, remove the heads, pull the cylinder, shim valves, index cams, add nitrous injectors, or drop the motor. Try putting N20 in the airbox of a 14. You need the hands of a 2 year old.
The new fairings on the 08 Busa are difficult the first time, but its only a 5 minute deal after you've done it once. Working on the Busa motor is like working on a F150 pickuptruck; pop the hood and climb right in.
I personally believe this is the only substantial and quantitative engineering difference between the two bikes. If you're goint to race or beat on the bike, the Busa is a better bike.