Fried on the V380 from the same German hi-fi forum I cited before:
“The DHA V380 is significantly lower.
The DAC in the device is the same as the V590, but the equipment is significantly reduced.
There is no balanced line inputs, no balance, no remote control, etc..
As I said, the V380 is a bit slimmer than the V590.
This does not affect the D / A part, it is spot-on.
The "heart", the actual headphone amplifier corresponds to that of the V590.
There are differences in the power supply (only one transformer), front (6 instead of 8mm), inputs, outputs, balance, no remote control etc.
The DHA V380 will cost less than 2500 euros.”