Clip-on Tuner Comparison (NS v. Peterson)
 

Just sharing my experience....

I have a Planet Waves NS Mini Headstock Tuner (new version) that has been great. I received a Peterson Strobo-Clip as a gift.

The Peterson many settings / calibrations for different tunings but as standard chromatic tuner both the NS and Peterson were equally as accurate. The Peterson may be a little easier to read but I leave the NS on my headstock all the time so it's always there.

I got the NS from BassStringsOnline (of course) and unless you need the tuning variations of the Peterson, the NS rules!