BAT Rex II vs BAT VK-150SE


What are the differences between the Rex II monoblocks and the VK-150SE?

I am currently using the VK-150SEs to power Rockport Cygnus speakers with a Lampizator Big 7. What improvements can I expect if I upgrade?
davidbrinknyc
Thanks Riley. However, I'm really interested in sonic differences rather than the technical differences. 
I'm really interested in sonic differences rather than the technical differences.
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