Amp comparison

@bifwynne 
In what ways is it significantly better?

Thanks

@bigkidz 

Rolling the KT-150s in the Ref 150 made a noticeable difference.  Deeper and tighter base, smoother range.  But the SE mod took the amp to a different level.  Bass was tighter still, more open and transparent, better control over the speakers.  
But to be candid, I made the switch over to the SE version many years ago so it is hard to be very specific on details.  That said, if you have a chance to A/B the regular 150 with the SE version, the differences will be day and night noticeable.

Well playing devils advocate a fellow Audiogoner has had both the Ref 150 and SE.  He preferred the 150.  Felt it was a overall tubier sounding amp. 

Thanks all again for the feedback. I am still chewing on this and more feedback would always be welcome.

I had a Ref110 and upgraded to GS150 (the predecessor of the Ref150se) and the difference is striking.  I have not regretted the move for a second.