That is typical with parts like these. From what I understand the genuine one just has more parts done by Taliaferro. In other words, they put the rod into the base and then you just put it into the car. Because they use a regular ock base, you send your in for a refund. So factor this in and its only $125 more. There must be other differences I'm not so sure of.
Most of the ime is just taking out interior panels. Not oo hard, just tedious not to break too many clips. MP has some good instructions on their site.