Nope. It's pretty much the same. There are a few slight differences such as the appx sideloading option and the Windows To Go. There really isn't a whole lot of difference between the enterprise and pro versions these days.
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Why aren't you using it ? In the same build 9879 the two versions (Pro and Entersprise) have the same features ?
I'm not using it because i always like the extra features enterprise has given me now and in the past. And I ran my own compagnie for years so i think it is just like a habit to me to use enterprise For the features I think there are not many differences anymore now a days so both will do the trick for you
Probably because after install TP, the machine connect to Internet Connect to internet = Connect to Insider Program
In certain situations the TP does not auto activate, and you do get asked for the key. i.e. sysprepped administrator account.