[morzh]

The lower resistance itself does not mean worse filtering, it CORELATES with worse filtering as it corelates (not by law by by practice) with smaller inductance, and the inductance provides the main filtering in concert with a cap after it.
It is possible to have a larger inductance with smaller resistance and vice versa.

The typical resistance being 1K and cap 10uF give RC=10ms which is not effective filtering for AC Mains with its T=16ms, this is why resistance alone matched to coil's does not filter as well.
However when subbing a smaller coil with extra choke, ir is dsirable to match DC resistance reasonably close to original as the resistance determines the B+ serving as part of the divider.

So, if you subbing a Perm magnet speaker, choose a choke with a reasonably close inductance and current ampacity, and if the DC resistance is smaler, add a resistor to bring it clise and with proper dissipation ratin.

If using a field coil speaker, in practice unless the coil itself is way smaller, I would not add a choke but simply would add a resistor, again not as much to help filtering but rather to kep DC voltages the same.

Not an exact science, there will be compromises to make.