Actually, learned this one yesterday, but just got around to writing the post. I was actually clued into this by some friends in the UK.
According to these VMware docs:
An ESX snapshot contains the VM settings. Thus reverting it, will also revert this settings. Because I was under the opposite impression, I had to see for myself:
Snapshots revert settings… can’t explain that.
It makes sense, but I’m not sure why I was under the impression it was otherwise. I hope by putting this out there my help others. If you found this useful, have comment or questions, drop a line in the comments or on twitter here.