Compare xk to xkr

I have decided to purchase one of these two vehicles. I am interested in how a long time enthusiast views the difference between these two beyond the additional hp of the xkr.

  1. Does either require any special maintenance?
  2. Does either have any predictable issues I should be concerned about?
  3. I am leaning toward the model year of the 2012, but am open to the 2010 and 2011 too. Are there any important operational differences in those model years?

There were slight body design changes in 2012 which lasted till the end of the run for the XK in 2015 .Also changes to the design of the seats .
Kim R
2012 XK Convertible
2005 XJ81961 Mk 11 3.8