Mark levinson 532 vs 531h

I am currently using 3 Mark
Levinson 531h monoblocks as part of a home theatre setup. I am considering to get a Levinson 532 ( not 532h ) in place of two of the monoblocks. Does anybody know how much of an improvement that will be ? Will the 532 be much better than, say, two Pass Labs 600.5's for instance ?
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