Why don't you try all 3 and get some oscilloscope readings.

I have never noticed a difference with either of the Lytic/Ceramic/Tants, in any 68kmac.

However I would think an oscilloscope would visually show you if there was any differences.

sound out of a 68k mac is not for audiophiles anyways. Well maybe for the Q840av etc?

I have never been told to use tantilums with an Amiga re-cap... however the use of Bi-Polar lytics was requested for the audio circuit of both A4000's .