BroooooobiIt's definitely not better, but it is different.
two main differences are -
The Bravo amps are designed for hard to drive headphones; high impedance (120Ohm or more) and low efficiency. low impedance headphones sound bad in comparison.
E9 is a highly versatile, true all-around amp that will have enough power to properly drive almost any headphone in the market.
E9 sounds very neutral and flat, consistent in its sound signature no matter the headphones you plug in.
The Bravo amps present an entirely different sound, with a lot of warmth and sparkle, which some refer to as 'tube sound'. The highs and lows are emphasized and the overall impression is a V shaped sound signature that compliments a lot of headphones, but not all.
BroooooobiIt's just an amp, not a dac.
3.5mm or RCA to your dac/player/sound card.
If you're frugal and don't have a dac, get a HiFimediy sabre u2 for less than $60.
BroooooobiBravo will be a good match with the E07K .
Buy it just to mess around with tube sound, especially if you have low efficiency headphones, such as beyerdynamic, sennheiser hd650 etc.
I can guarantee you'll get a whole different sound out of your headphones, compared to the E9.
This alone is worth the purchase :)