I just found this little clip that has a few of the model differences.
2000 Land Rover Discovery II: Addition of an integrated compass to the rearview mirror was the only notable change for 2000. A new fuel-filler-door indicator went on the instrument panel. Ford bought Land Rover from BMW this year.
2001 Land Rover Discovery II: For 2001, the Discovery reverted to three trim levels--SD, LE and top-line SE. Adding the optional 3rd-row seating changed badging to SD7, LE7, or SE7. An optional SE/SE7 performance package included 18-inch wheels and Active Cornering Enhancement. A rear self-leveling suspension was standard in "7" models, and available for the LE and SE. Leather interior trim was standard for the SE/SE7. A new 10-speaker, 220-watt premium audio system became available this year.
2002 Land Rover Discovery II: A new top-line HSE edition with DVD-based entertainment and navigation systems debuted this year, joining the base SD and midline SE. The LE model was gone. An optional Suspension Package for the SE/HSE added Active Cornering Enhancement. A rear self-leveling suspension was standard on seven-passenger models. Leather upholstery was standard on the SE and HSE, along with 18-inch wheels (versus 16-inch for the SD). A limited-production Kalahari off-road edition went on sale later in the year.
2003 Land Rover Discovery II: A 217-hp 4.6-liter V8 replaced the 4.0 V8. The grille, headlamps, and front bumper were restyled for '03, and instrument graphics were also revised. A rear-obstacle-detection system was new and exclusive to the HSE.
2004 Land Rover Discovery II: In 2004, Land Rover produced 200 limited-edition G4 Editions, named for the Land Rover sponsored off-road challenge. The G4 is orange and includes self-leveling suspension, front brush bar, rear access ladder, and lamp guards. Also new in '04 is a driver-activated locking center differential.