Did this video to show differences between the headstock tuners below, more specifically how fast they track. Do not need much speed but fast enough for tuning. As far as features they all have the same capabilities except for the fishman which can be switched from clip to mic.

Used the korg ca-30 as a reference

- planet waves mini pwct12 (approx $20)
smallest of all, tucks away nicely
tracks best

- intellitouch pt10 (approx $30)
nice display