"Thomas Borchert" wrote in message
...
Tarver,

It is pressure altitude and the 5 times per second GPS engine that give
the
CNX it's advantages.


Hmm. Have you found the update rate of the Garmins lacking? In what kind
of
situation?

The VNAV function for GPS will require the faster engine and pressure
altitude. If the operator is not using the VNAV function, then there is not
much difference; for now. If at some point the system is able to automate
ATC and free flight goes forward, more capability under CFR 14 is likely to
require the new generation of GPS equipments.

Besides that, both machines are Garmins.