After using both, I think sonetics is a good investment if you're going to use that type of communication regularly. Bumping out is much more difficult to pull off, unlike sena, and, also unlike sena, bumping out won't affect multiple people. I find the pairing of sena to be far too painstaking. I enjoy the seal of the sonetics muffs better than the modified muffs most of us use with sena. The system tells you your headset charge, and pairing to the base station is a snap. There are also no wires to install in helmets or units to forget/lose.
The downsides are needing a power source for the base station, having a stationary range radius, and boom mics, if those bother you.
Senas are great, too, for different reasons. They don't require a boom mic, the unit can be detached to charge or swap (though I've seen a few destroyed or lost because of their detachability), and there is no base station to get out of range from (just other units).
So both are great. Imo, the simplicity of the sonetics system will pay the cost difference if used regularly. If these systems are only used occasionally, sena is a good investment, but even then the simplicity may be worth the big price tag of sonetics.
No, I don't work for them.