Either will work! Your Digitakt has balanced outputs and the Model12 has balanced inputs, so you can use balanced cables to connect them, but you could also use unbalanced cables and get the same result.
The difference between balanced vs. unbalanced cables is only really apparent when you’re using long cables (i.e. longer than 10 feet) to connect things — in that case, you want to use balanced connections to avoid noise in your signal.
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