The SNAXO certainly needs the special 4pin Din-4pin DIN active leads when running with the smaller Amps, as the regular SNAICs are a little bit too capacitive and can lead to instability. The Active leads use the same cable as the DIN-XLRs used on the bigger amps.
As for the IXO, IIRC I think you can use SNAICs here. BY the way, if your SNAICs are grey then moving to the later black ones is a worthwhile upgrade.