Here is my take on Avaya Vs. Genesys.
I feel like Genesys is an enhanced layer that wraps around Avaya. Many if not all of the functions in Avaya can be replicated in Genesys, but the truth of the matter is, you usually have Genesys crash and not Avaya.
When comparing report data, for example, Genesys stats are ALWAYS compared to Avaya and if there is a discrepancy, it is Genesys stats that are being questioned and not Avaya's.
Working with many Genesys product, I like the overall idea and most of the products because of the features. But FEATURE is defined in Websters as:
" a prominent part or characteristic b : any of the properties (as voice or gender) that are characteristic of a grammatical element (as a phoneme or morpheme); especially : one that is distinctive"
so, you have something that feature is a part of, and this, unfortunately for Genesys, is still PBX. As long as Genesys relies on PBX, it will only be that: a nice and expensive feature.
Perhaps this explains Genesys' move into IPPBX...
So, summarize it:
Genesys is to Avaya what Advanced Settings in your Windows Network Settings are to Windows itself.