I recently swapped from heated leather gt seats in my 2008 mk5 to cloth heated mk6 gtd seats & it was a straight swap & all the plugs was the same, the only part i had to swap off my old seats was the under front seats lights as these was retrofitted to my car & i wanted to keep that feature. the slots was in the front seats just needed the lights a looms swapping over.
The main reason for the swap was for the comfort factor being high sided sports seats & i was offered them for a silly cheap price £270.