Krishna pays a left handed compliment to Sakuni when Krishna went to Duryodhana's court, before Mahabharata war, to avert it.Krishna even calls Sakuni as Maama,Uncle, saying that they are partners in the scheme of things. Only that Sakuni did not realise that.
Lord Rama was an Idealist. Krishna a Pragmatist. For Rama Means were as important as the End. For Krishna End justified the Means, in upholding Dharma. Rama grew up amidst Royalty, Krishna among cowherd never became a King, remained a prince throughout his life.