Right, no difference between conventional or trunked..
I'll also add that the actual throughput isn't 9600 or 4800, it's actually a little less if you are trying to run data.
In "transparent" data mode, 12.5KHz channel will get you a net data rate of about 3700 bps.
A 6.25 channel will get you about 1850bps.
That due to headers, footers, error correction, etc. etc.