How much different is yo zuri hybrid from straight fluoro. I am using sunline flouro currently and am entertaining the possibility of switching. Is there any sensitivity loss?

I don't think you will notice much difference. Give the Yo-Zuri a try,

it's an inexpensive experiment.

 

 

There are subtle differences between YH and flouro in my opinion ...and a couple more significant ones.  Subtle, I think YH may be a little thicker than similar fluorocarbons of similar pound test rating.  More significant is that YH stretches less than fluorocarbon lines.  The knock against YH is that it does not have the sink rate that 100% flouro has (which is denser).  

 

I've come to the conclusion that unless I specifically need a fluorocarbon sink rate (drop-shoting, light finesse, etc) that YH is the better all around and user friendly solution.  I have 8 rods rigged with YH, 1 with flouro as a main line and 1 braid with a fluoro leader.  But then again, I'm not a pro either...just an amateur but it works well for me.