I have both the cyber and the slimline single, I have used both for different types of situations. I would have to say that for the shows that I've had to call from backstage it has been helpful to have the slimline single; the cyber has worked great for tech tables and FOH calling. I did notice that they have a new headset, the eclipse, which is similar to the clear com lightweight headset.
I guess my advice would be to figure out where you plan on using it more if it's backstage then the slimline is probably the headset for you. I will mention that when I bought my headset the cyber wasn't that expensive and part of the reason why I ended up with multiple types