Vykon pro does not have a license check. You may get hit if it is not signed at 4.10, but that is not too hard to fix.
The biggest deal I see is that the Webs model was cheaper controllers that only talk to a Webs jace. Or more expensive controllers that talk to any jace. It is possible your controllers will nut upload and download through the vykon jace without a webs add on that will cost money and might not be possible to get without a webs hookup. They will still talk vacnet or lon or whatever, but they will not upload and download likely.
Hmmmm....smells like numbatwo to me.