Nothing that I can think of. Both are fine. 'To' is more in use in AmE.
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allthewayanimeMy English teacher said that 'in contrast with'The problem is that your example sentence does not have "in contrast with". There's no 'in' in the whole sentence!is behavingbehaves as a verb: His jacket contrasts with his plain pants
allthewayanimeMy English teacher said that 'in contrast with' is behaving as a verb: His jacket contrasts with his plain pants; and 'in contrast to' it's behaving as a noun : His jacket stands in contrast to his jeans.Just to make it clear: in contrast with and in contrast to both contain the noun 'contrast' as object of the preposit