Delfox,
If you have a C14, I'd go w/ the Rostra.
I've installed both. I usually use the Audiovox CCS100 for a carb'd bike, and a Rostra for the newer FI'd bikes.
The C14 has a VSS, and it's faster and easier to install a Rostra.
The CCS100 is cheaper, but requires a lot of other parts to buy, too. So, in the end, I think it winds up being around $50 cheaper, but more install time/work.
Most carb'd bikes don't have a VSS, and plenty of vaccuum sorces.
With the Audiovox, you have to make a vaccuum reservoir, which also takes up space.
To me, the all-electronic Rostra's the choice for a C14, and the install is well-documented.
Both will work though.
Suggestions;
1. Order the 250-1223 Rostra kit.
2. Order the MU-162 switch mounting plate bracket
3. Order the 250-3592 switch w/ engaged light
4. Order 2- MU-141 relays.
One relay is for the brake system tie-in.
The other relay is for the engaged light on the switch.
Having this switch/relay setup will help you in more ways than just visually seeing when the cruise is engaged. It also can help you quickly diagnose if you're having a mechanical issue or an electrical one, too.
I've installed about 8 of these now, and installed mine on my 2011 C14 as well, 3 years ago.
Love them!
Good luck, whichever one you choose.