I have only used the MFJ 259B. It meets all my needs.

Capabilities as listed in manual:

VSWR, coaxloss, capacitance, inductance, impedance [magnitude], return
loss, reflection coefficient, distance to fault, resonance mode,
percentage of transmitted power, test of stubs, velocity factor, Zo of
transmission lines, beverage antennas, adjust tuners, adjust matching
networks, test rf transformers, test baluns, test rf chokes.

Deacon Dave, W1MCE