So ... the differences:
1) mounting terminals: wire, forked or ring connectors, (other?)
2) shunts: may not apply to any but 1-pole contactors though I hear the shunt may be phased out and a 1 /2-pole will then have a shunt (?)
3) covers: seem to be over the switch side of the device on some or both sides or none at all.
4) mounting plate and overall size ... or just how it fits into and mounts to the body of the appliance.
5) there could be more but these are all that came up in my search for parts.
1) mounting terminals: wire, forked or ring connectors, (other?)
2) shunts: may not apply to any but 1-pole contactors though I hear the shunt may be phased out and a 1 /2-pole will then have a shunt (?)
3) covers: seem to be over the switch side of the device on some or both sides or none at all.
4) mounting plate and overall size ... or just how it fits into and mounts to the body of the appliance.
5) there could be more but these are all that came up in my search for parts.