I believe the HexKit tileset folder has an import file in it that makes it easier for the hex tiles to align with Cecil's Hex Kit. If you're using Hex Kit I'd recommend importing from that specific folder, but otherwise the content should be the same. Let me know how you like them, I'll be dedicated to the second set in the next month or two.
My alignment issues are resolved -- was a flat-topped tiles thing... they look great now!
And it looks to me like the two files are the same files, just tiles in stacks and not. The demo set is unstacked... any chance those are around somewhere with stacks / folders?
Good to hear about your second set. Will you have a version for Hex Kit?