No, they are not the same.
I guess I don't know what the correct key words for good search are...
That's too bad! The project just got a bit harder. I'm assuming that the crank/flywheel pcd is different too? Is there a source for the bellhousing bolt pattern measurements for the vh45de? Since i can't go with an off the shelf solution I'll probably go with an audi transmission and make my own adapter.
I'm building a trackday car, building my own tube chassis, using miata suspension bits, and apparently an audi trans. The whole car,sans body work should weigh in around 1300# maybe less.
Thanks for the info.