Standard ISO install vs Ubuntu install

[Helios]

Is there any difference between install Zentyal using the ISO from the website or installing Ubuntu first and then installing Zentyal on top of it?

[chidgear]

It is more easy adn way lot lighter installation if you do it from the Zentyal ISO (also, you save some time).
Ubuntu has a set of apps installled including the ones of Gnome that are more "heavy" than just the Openbox window manager and a couple of individual apps.
Greetings!

[Drekorig]

Installation from deposits Zentyal is not longer than for iso.
And if you chose Ubuntu Server you don't need install Xorg server.