I recently bought a Studio-Capture as I needed more than 8 mic preamps that my Octa-Capture has.  After looking at interfaces for a long time I finally settled on the Studio-Capture.  The learning curve for the new unit was short since it is basically the same. 
 
However, two differences that I don't like.  (1) there is no switch to mute the studio monitors (like the Octa-Capture has) just a volume control.  (2) the Auto-Sens function to set the levels is flakey - sometimes it works, most of the time it doesn't or least doesn't on the first try.  On the Octa-Capture it worked every time, although it works manually.
 
I could have bought another Octa-Capture and daisy chained them but thought a separate unit with more mic preamps was better.