I don't see any similarities at all in comparing these two examples to in-person Murray's I've seen. The first one is in outer space. No similarity whatsoever. And while the second one is a bit closer to what I've seen, still way off the radar of plausibility. I'd have to agree with Devon, unless recently, Bill's signature has undergone a moderate to drastic change.
It hasn't changed aside from losing letters. Neither are even remotely Murray-like.
You're welcome, Judge!