What Todd said. I noticed a much better feel of comfort, tightness, handling, etc. when I traded my '07 to my '10. Everything seems more precise and crisp.
If the '08 was in good shape and had maintenance documented, I would probably go for it. The V8 is sweet, and a year newer is a year newer. I probably wouldn't do the trade if I had to pay more than $1000 or so for same vehicle. Remember, the '08 has a bigger mileage penalty due to being one year newer with similar mileage. Let NADA be your guide.
Idea: instead of trading, buy the '08, and go through and swap as many of the newer/better condition items (if any) from the '07 to the '08 and then sell the '07 (tires, wheels, battery, floor mats, ripped upholstery, any good accessories, upgrades, etc.).
If it were an '09 or '10, I would jump at it due to the minor improvements implemented. No doubt there were improvements in some parts, manufacturing methods, etc. from '07 to '08 too.)
Good luck.
Also, :worthless: of both vehicles!!! :banana: