stepper amperage/resistance

In a catalog from a local supplier of steppermotors I can see the
Sanyo Denki H-series motor 103 H7126 (nema23) supplied in three
different versions, -0140, -0740 and -1740

The only specifications that differ are the phase resistance,
inductance and current.

Currents are 0.75, 2.2 and 4 A
resistances 8.6, 0.9 and 0.48 Ohm
indcutances 19, 2.2 and 2.2 mH

holding toruqe is the same for all of them, 165 Ncm.

Is there any difference between this motors when using them for cnc
purposes ?

The stepper drive obviously needs to limit the current to a
different value. Maybe a stepperdriver for the lowest current model
is cheaper than for 2.2 or 4 A ?

Any other differences ? What about voltage ??? how is "motor
voltage" calculated from these figures ? how is a suitable driving
voltage calculated from that ?

thanks for any answers,

AW