How tastes differ. I used a 23mm Mühle almost exclusively for a long time.
Then I got a 25mm Mühle and it was the best thing ever and 450 shaves later...
...I got a 30mm Jayaruh bush. That is the perfect size. For me.
I’ve recently purchased a 25 mm version of the EJ stf and like most new generation synthetics it is an excellent brush. It lathers very easily and feels great on the face, sure it’s not as soft as a cashmere knot, but it is far from Stone Age in comparison to the current new gen synths. I’ve used it twice so far, but I’m going to take it on a tour of all my software from sticks to creams. Very impressed so far.