When I went to balanced connections with my ML 433 I was quite happy with the result. If a company goes to the trouble and expense of a fully balanced option, like your ML 336, it is likely to be the best option. But, just because a unit has XLR connections doesn't mean its fully balanced.
My ARC LS 27 and ML 433 sounded better even with cheap balanced cables than they did with expensive single ended.
My ARC LS 27 and ML 433 sounded better even with cheap balanced cables than they did with expensive single ended.