4 to 5 years newer, second generation hull, improved Drive, better condition, several other innovations (improved Twist N Stow rudder system, improved Click N go Drive attachment system, etc), higher residual value down the line -- for $400 more? The '09 sounds like the bargain on the face of it, especially considering that it's still under its transferable 2 year warranty. See what optional equipment, if any, is included with each boat (cart, Turbofins, sailing kit, Sidekick, fishfinder, ram mounts, bait tank, etc) -- they can add quite a bit of value if you can use them.
PS Always verify age by looking at the last 4 digits on the serial # (stern, bottom of hull). Last 2 digits is year model, 2 immediately before is build month and year. For example, ........K708 was built Nov. '07; '08 model year. Months are designated A - L (Jan - Dec). This is important because many changes run with the model year; warranty runs with the build date in the absence of any verifying sales information.