The R89 has a relationship to the Edwin Jagger and possibly the King C Gillette. Both are less expensive. All are good.A warm welcome to TSR ,
For a first razor you can't go wrong with a Muhle R89, it's great for learning, cheap and it delivers a first class shave.
As for a headshave I would buy a Leaf razor, I keep my head shaven and have yet to find anything better for no cuts and speed but as always YMMV.
All of the razors mentioned in your thread are here. The EJ special is the Kelvin: