Finally got around to loading these. I only ever use Ping Hi and Ping Low, which are not among the modified ones (and are pretty clean as-is), so I guess I won't actually be partaking of the new samples.
Out of curiosity, though, I loaded up old and new Beep samples, and found the new one has its first sample way up at the -27dB level which makes for an audibly distorted attack, though it's largely masked by the high amplitude peak of the "body" of the sample. I haven't looked at the others, but can't say I would consider this one an improvement from a purely technical standpoint.