Merlin identifies birds as soon as it thinks it hears one; that is quite nice. I can click on the listed bird and it will jump to the section(s) of the recording where it heard the bird. Iirc birdnet makes you create a selection. I am no expert but they both seem accurate.
I’ve tried multiple times to get the song ID to work, but the birdsong has to be so loud in the recording for it to detect it that I rarely get close enough to a bird for it to work. I was sad about that, it seemed so cool. And to be honest, for visual ID, I still prefer a bird book. Maybe it’s just a me thing.