Hey guys, I Just can't find A/B tests of those two amps. So, what do you think: 1. Which one is better overal? Why?  2. Which one is better with Beyerdynamic HP's?  3. Any A/B comparisons with Bottlehead Crack? How much Crack is better from one and other? Cant afford Bottlehead Crack...

Hello there,  Which one is better for cheap gear? Which one is better with expensive gear (scales better) ? What is the main differences in comparison (body, soundstage, imaging, bass, treble) ? Which do you prefer more and why? Has anyone compared these headphones (especially with...