well.. there it is. Compression pressure spec is lower for 2011 and the spark plug gap is different:
2010
Fuel Min 90 Avg. Oct. Unleaded
Compression Pressure 214 psi
Spark Plug NGK CR9EIA-9
—Gap 0.8-0.9 mm
Engine Oil SAE 10W40 API SG, or SH, SJ, SL or SM with JASO MA
—w/Filter Change 4.0 liter (4.2 qt.)
2011
Fuel Min 91 Research/87 Avg. Oct. Unleaded OK
Compression Pressure 200 psi
Spark Plug NGK CR9EIA-9
—Gap 0.7-0.8 mm
Engine Oil SAE 10W40 API SG, SH, SJ, SL, or SM with JASO MA, MA1 or MA2
—w/Filter Change 3.8 liter (4.0 qt.)
This could mean the engine really is different, slightly, or that the engineers have just revised there specs.. rounding in the other direction? Smaller gap on plugs.. allowing 87 Avg. Oct. unleaded. They are also allowing more oil specs and a smaller quantity.
Keep in mind that these changes could be 100% on paper and not in actual parts on the bike.