Without RFX9600 extender you cannot do Power Sense which is in effect conditional behavior for power state. However, with scripting (with our without RFX9600 extender) you gain the benefit of what are known as "variables" through the use of System Globals that in effect aids in solving complex problems.

I personally prefer the form factor of the 9300 over the 9400. However, I like the larger screen on the 9600.