Conventional versus Ultimate
The distinction goes back all the way to Buddha's students' original Maha-Sangha and its two sub-schools Bahushrutiya and Prajnaptivada. From Wikipedia:



  According to Paramārtha, the Bahuśrutīya school was formed in order to fully embrace both "conventional truth" and "ultimate truth."


and


  The Prajñaptivādins were early articulators of the two truths doctrine.



The relationship of the two truths is the main concern of Buddhist ontological tradition called "Madhyamaka". According to them, the "ultimate" that is defined in opposition to "conventional" is not the true ultimate. As you say, these two are mere views or descriptions of reality. The true "ultimate", they argue, is beyond all descriptions, and therefore complete and does not stand in opposition to anything (is all inclusive). One of the very many texts that elaborate on this point and its implications is Karmapa's commentary on an ancient little stanza known as The Cuckoo of Awareness.
As my Zen Master said, it is one thing if I explain this, and another thing if you get it yourself. Therefore I will leave this one unanswered.