Faster, worse mileage, nicer interior, 120mph speedo, heated seats front and back, autoride suspension for towing. I'd look at a few Denalis too, I love my '02 compared to a standard yukon.
I has the 120 mph speedo, don't all 03+ Tahoes?
rear heated seats and 6.0 is all I can think of that you can't get in a Tahoe, and HID on 03+ Esky.
having a 4.8 makes it a near no brainer as long as you are aware of the increased expenses in insurance, maintenance, etc.