That's nonsense.
Abu Dhabi is a good amount more expensive with then Dubai so if they even do anything then for sure going with the pricing in Dubai.
Sorry but something like I "heard" and "90%" discount is nonsense for someone like me living in the UAE.
Everyday you "hear" something and in reality nothing changes really - especially 90% discount on GoV Fees.
Anyway Dubai and Abu Dhabi has the same reputation - international and domestic - in front of the Banks etc.
As most people - if even - live in Dubai - it still makes more sense to have the Company along with the Residence Visa in Dubai.