Correct. Also the 05's have upgraded rear brakes, and a few other little tidbits. A quick search here will get you the full list.
I have 13K on mine, and the clutch is fine.
How long it lasts also depends on how hard you use/abuse it.
Hint: Don't tow anything. LOL
If you drive nicely, it will get about the same.
Stepping on the throttle is basically like shotgun'ing a beer but using the gas tank instead. LOL That loud noise you hear when romping on the gas? That's thousands of Saudi Arabians cheering.
I have had no issues with durability over the last 6 months since I bought my '05 RC (my daily driver).
If it's not covered under warranty, someone on this forum can either get you the part or walk you through fixing it. Yeah...they're that good.
Tires- yes. There are some great sources on here for everything from cheapie-burnout tires up to uber-high performance ones. I'll probably go through a set a year (and save a couple of the old ones for burnouts at the Nats. LOL)
Oil changes can get pricey. Wal-Mart-type stores are a good place to score the gallon jugs of oil. The good news is that the oil filter, from Mopar, is only about $5!
It'll be a lot like your previous truck, but every stop you make people will ask you about it.