I'm using AKG Q701's and Sennheiser HD700's so please explain what the above means?
"Presentation
The HD681 EVO output what the music gives it to work with. The soundstage is neither expansive nor cramped. The sound is presented as if it’s coming from a mid-sized indoor concert with speakers surrounding me, intimate but never congested. The impressive thing about the soundstage is the accuracy in which the music is delivered and the sense of space the instruments have. The sound is all around my head, very 3d like in how it’s being presented to me."
https://www.head-fi.org/threads/review-superlux-hd681-evo.670051/
"The Superlux HD-681 Evo is a budget-priced pair of headphones intended for professional use"
https://www.pcmag.com/review/362059/superlux-hd-681-evo
"The best-selling model HD681 is a high quality headset with rich bass, crystal clear high resolution and accurate sound field positioning. Now the new HD681 EVO upgraded version has a completely new, more slender shape and an improved smoother, more neutral, treble tone. The HD681 EVO easily meets the requirements of stage and studio professionals for a high-quality sound in monitoring headphones."
What I meant is that AMD gives very good image quality but not quite ideal, while nvidia's is more leaning towards pathetic image quality.