the 07 to 09 models had the same rotor the 10 and later models had a different rotor.
The SE compensator you're referring too will work on the 07 model without changing rotors so that part is good. The current version of HD SE compensators will not work without a rotor change.
Personally I would just get off the extra money and get a Baker compensator but you will still need to change rotors if you decide to do that.
The SE compensator you're looking at still had issues going out, the problem is HD didn't put any oiling channels in the compensator which lead to failure overtime. Don't get me wrong that version of the SE comp was better than the stock comp in the 07 model bike and you should get a couple of years of normal riding out of it if the comp you buy is new not used.
I went through 2 of those SE compensators in my 08 until I went with the Baker comp, I never did try the current version of the HD comp.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.