4.18.24010.12 (would suggest Stable Patform Release)... whereas 4.18.24020.6 (would suggest BETA Platform release, most likely for Dev-Canary Test systems) Personally, I wouldn't be jumping between the 3 editions on offer here... pick one and stick with it...
Will more likely than not... work. You will however, probably have to get your updates from here as Windows Update most likely won't update it unless it specifically applies to the OS edition you are running, note: definition updates wont be a problem. You could have a look at my previous post for other relevant information... edit: just noticed you have already seen said post pays dividends to have some idea of what you are getting in to. Hope this helps...