More serviceable, lighter to spin up to speed (it's all about rotating weight), prefer 'normal lacing' to G3, unless you are going really fast you won't notice the aero difference.
More serviceable? Same hubs. Only the Hyperons carry a lot more spokes to adjust than the Boras which I personally find quite a bit quicker to service spokewise. That said I never have to touch Campa wheels that much.
I had (and stil have) two sets of Boras (one Ultra the other Ultra Two) before acquiring a second hand set of Hyperons which I bought to replace some aging Neutrons (tubular of course).
While I haven't ridden the Hyperons that much yet the first impression is that although technically very similar to the Neutrons they're much more like lighter Boras without the aero.
Just as in Tomassini's location it's hilly atround here but nothing the Boras can't handle (provided the rider is in good enough shape).
The irony is however that the much heavier Neutrons are much easier to climb with than either Bora or Hyperon. So, go figure...
For what I do I don't really need the Hyperons. I guess I'll mostly fit them whenever I really need to climb or whenever the wind is blowing too hard for the Boras (rarely happens and I bet the Hyperons will get blown around just the same).
So, all in all the Hyperons are nice but for my use the Boras are a much better choice.
I wouldn't really train on them though, well, not in a large group anyway.
I can see the Hyperons do better than Boras in a typical Belgian style crit though.
Guess I didn't help much.....