i know glock is 109 and steyr is 111 degrees. I'm sure you can look it up on the walthers somewhere, i know there is a walther board, as well as a walther section over on GT.
I don't own a walther and only shot one once, but i remember it not being as steeply raked back, but that was just my impresion. It was the only other gun I found to be about equal in comfort and accuracy (TO ME, IT"S SUBJECTIVE). Just more percieved recoil.