Cambridge Audio Azur DacMagic vs Micromega MyDac? Anyone familiar with both?

Hi gang:
I'm considering replacing my first generation DacMagic with a Micromega MyDAC in my primary system, which is all tube electronics into Sonus Faber Liuto monitors.  I am using the USB port on an older Macbook to connect the DAC.

I would then use the DacMagic in my secondary desktop system- speakers are Audioengine A5's.

My question is: will the Micromega MyDac be a noticeable improvement or more of a lateral move?  I am new to streaming and the DacMagic is my first DAC.

Thanks very much.
I now have the Micromega and would like to report that it is better than the Cambridge Audio Azur Dac Magic in my primary system which has world-class tube electronics and speakers.

But,   I have now moved the DacMagic to my desktop system, which employs Audioengine +5's and THAT system is greatly improved.  

I am a very happy audio guy.  What a great hobby!