Brewer's: Tweedledum and Tweedledee
Some say compared to Bononcini That mynbeer Handel's but a ninny; Others aver that he to Handel Is scarcely $$$ to hold a candle. Strange all this difference should be 'Twixt Tweedledum and Tweedledee.
This refers to the feud between the Bononcinists and Handelists. The Duke of Marlborough and most of the nobility took Bononcini by the hand; but the Prince of Wales, with Pope and Arbuthnot, was for Handel. (See Gluckists.)
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894