USRP Carrier Sense

Hey everyone,

I’m on a USRP doing some prototyping of a simple packet radio. I wanted
ask the best method for detecting bursts. GNU Radio seems to support
both a
‘probe’ e.g.

probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
detected = probe.unmuted()

from, and a ‘file sink burst tagger’ e.g.

det = gr.simple_squelch_cc(self.threshold, 0.01)
fsnk = gr.tagged_file_sink(gr.sizeof_gr_complex, self.samp_rate)

from Are these functionally equivalent? Is one
better to use than the other?