I find the Resiprene-C is grippier than micarta or G10, and prefer it over all other Busse handles for comfort and security of grip. Also, to answer your question about tang strength in a little more detail:
Below is a pic of a bare tang from a Basic 7, which is the same handle as used on the B9. The tang is full-thickness along its length to the rear of the knife and all corners are radiused to preclude stress fracture:
You’re not going to break the tang. Even when Noss @ KnifeTests.com put a B9 blade in a vise and beat on the side of the handle full strength repeatedly with a 3 lb. steel mallet, the tang didn’t fail. During this test, he opened the vise to check the blade and failed to re-secure it correctly. When he began beating on it with the mallet again, the blade broke at the point weakened by the vise jaw during his first attempt to break it, so the tang endured even after the blade broke under full-power lateral blows with the sledge. Here’s the web page documenting the destructive testing of the Basic 9:
http://www.knifetests.com/bussebasic9dtest.html
And here is a photo of the remains of that knife, showing the handle/tang still intact and perfectly useable—only damage to the handle were a few small tears in the Resiprene-C:
Jerry also published test results on a Basic 9 as part of his original marketing for the Basic series, in which 32,000 lbs of weight was supported by the tang without breaking. The tang returned to “true” when the weight was removed, not even taking a permanent bend after supporting 16 tons.