The difference is that the Nirguna Brahman will not send any authorized advertisers, promoters or commission agents.
The concept of a formless God within a non dualist paradigm does have parallels with a Baha’i view of God:
To every discerning and illuminated heart it is evident that God, the unknowable Essence, the Divine Being, is immensely exalted beyond every human attribute, such as corporeal existence, ascent and descent, egress and regress. Far be it from His glory that human tongue should adequately recount His praise, or that human heart comprehend His fathomless mystery. He is, and hath ever been, veiled in the ancient eternity of His Essence, and will remain in His Reality everlastingly hidden from the sight of men. “No vision taketh in Him, but He taketh in all vision; He is the Subtile, the All-Perceiving.”…
Bahá'í Reference Library - Gleanings From the Writings of Bahá’u’lláh, Pages 46-49
Does He not manifest Himself from time to time to push back the darkness and to bring righteousness?
Whenever there is a decline in righteousness and an increase in unrighteousness, O Arjun, at that time I manifest myself on earth.
BG 4:7
I have not read Jai's reply to your query. As for me and as you very well know, I do not believe in existence of Gods or Goddesses. To me, they are imagination, falsehood.
I know your views on this very well.
You remind me of a movement within Christianity where some theologians lean towards atheism seeing God in their scriptures as a mere symbol. Nonetheless the sacred writings of their fellow Christians are very important to them as the Gita is important to you.
Krishna gives the clue in the very next verse.
"abhyāsena tu, Kaunteya, vairāgyeṇa ca gṛihyate." (BG 6:35)
abhyāsena - by practice; tu - but; kaunteya - O son of Kuntī; vairāgyeṇa - by detachment; ca - also; gṛihyate - can be controlled.
".. but, O Son of Kunti, by practice and by detachment also, it can be controlled."
Note that It does not require the grace of any God or Goddess.
Chapter 9 is all about devotion.
Only do not try to jump across the fence.
I’ll keep to my side of the fence if you keep to yours! It’s good to know where the boundaries lie between us.