Yes, the two distributors are interchangeable. Be wary about Paddocks too.
I had a 45D, not sure who the manufacturer was, but it was pants. First example was jammed and had to be sent back, second example worked for a few months before sticking in a very retarded position. I now run with the old 25D the Land Rover had when I got it, and it runs better than it did with the 45D even though the shaft is worn on the 25D!