Rocket, I have used both the sena and scala units in group rides. Both have their pros and cons. a con for both is they almost always need to be paired with your riding group, and the group number is small, something like 4 members. Using clever pairing using the "Sena's" in a chain a <> b <> c <> d <> e <>.... this number can be greatly increased, the connection process is very strange to talk. A and B connect, C then connects to B, D then connects to C, E then connects to D...... Then A through E can all talk on a open party line. I have seem this chain pair extend way past the Sena's normal operation range, around corners, where A and E were able to talk as long as the people in the middle were acting as a link in the chain.Scala's (if this feature is enabled) you can call to a random unpaired neighbor.I have no first hand experience with uclear devices.
The Sena units will also pair with other non Sena units. They do this by treating the non sena unit as a cellphone. I am highly skeptical of a claimed 4 mile range on uclear.
I just txt you guys