isIdentical

true if x has the same internal representation as y Notes: Even if two _decimal values are equal, their internal representation can be different:<br/> - NaN values must have the same sign and the same payload to be considered identical; NaN(12) is not identical to NaN(13)<br/> - Zero values must have the same sign and the same exponent to be considered identical; 0 * 10³ is not identical to 0 * 10⁵<br/> - Finite _values must be represented based on same exponent to be considered identical; 123 * 10^-3 is not identical to 1.23 * 10^-1