[PGME]

I've had both and frankly the 10-12 is much nicer.

I was able to get all of the timing chain (and a host of other issues) resolved for free under the manufactures extended warranty before they became a problem. My 2012 SC has been relatively issue free.

The power difference is quite substantial. The luxury options are also a lot nicer in the later models.

My two cents.

 

[PGME]

Yes, from the confusing language on the service sheet:

1. New water pump
2. The timing belt tensioner and various related
3. Super Charger Snout, Isolater rebuild and new bearings
4. High pressure fuel pumps (the ones located near the engine).

Out of all of these things, #4 really made a noticeable difference in power (this was done at a separate time from items 1 through 3). That being said items 1 through 3 were really preventative as they weren't causing me a problem yet. All of this was done at 75k miles.

This work was all done under the CPO warranty before it ended.