I have a Muhle-Pinsel (MP) razor with an olive wood handle and an Edwin Jagger (EJ). The MP has the old-style head and the EJ has the new-style MP head. You can tell the difference by looking at the knobs in the outer part of the head that holds the blade in place. The old head has knobs that are rounded on the ends while the new head has knobs that are flat on the ends. (See the picture at the right side of http://www.muehle-shaving.com/shop/classic/razors/77/8/1) I think that the new head gives a great shave; close, but without irritation. IMO, he old head gives a terrible shave. It gives me a lot of irritation and the blade angle is such that I need a number of passes to cut off whiskers. Luckily, the new head will fit my olive wood handle.
The bottom line is that, if you have a MP handle that you like, but, like me, you don't like the old head, you can buy the cheapest MP or EJ razor with the new head and use it with your old handle.
The bottom line is that, if you have a MP handle that you like, but, like me, you don't like the old head, you can buy the cheapest MP or EJ razor with the new head and use it with your old handle.