No. You pretty much listed the main difference already. For reasons I cannot recall (something copyright related) the title changed from Building of a Dynasty to Battle of Arrakis. And the Digitized speech that would play at the beginning of the intro (which I vividly remember to this day) is just omitted on the Battle-versions. Albeit the sound files remain present in the game directory. IIRC there is also a slight difference concerning the font and its way of rendering, as well as the text in the menu buttons in the options screen being centered rather than left aligned. I cannot recall more.

jaZz_KCS is correct, the voiceover and title change is the only major difference.

In case you want it, I'll just leave this here: A little patch I made a few years back that restores the voiceover and US subtitle. It's compatible with MrFlibble's patch, which I highly recommend.

I was wondering all these years. Somehow never bothered to look it up. Thanks for the clarification.

Just remembered something:
2-3 years ago Mr. Aaron Powell was leading one of the teams at work.
I had no idea what he was up to in his distant past, until one day in a casual conversation he dropped the "when i directed Dune 2 back in the day ..." .
Vertigo !!

What a moment. 😀