I'm looking at a nice used 2004 YZ for use in Croom type conditions (deep, sandy whooped trails) as well as near me in Florida with lots of roots. How would this compare to a 2007 suspension wise, handling, etc.? Isn't the engine identical? (It has a grarly & a Q on it). Isn't the seat height lower, & by how much? Anything to be on the alert for with a 2004? TIA!