Well sorry for not explaining correctly the result I mentionned. So the "2 to 10 times higher torque" comes from my personnal experience in SRM research.
However, what I would like to raise is that this result is not a general one: I am not trying to say that SRM are always better than...
To come back to the initial topic: motor technologies and especially Switched Reluctance Motors, the main reason why SRMs are not very widespread in applications is the high number of patents protecting different designs and innovations.
www.motorsoft.net/brivit.htm is the biggest database...