SQL Server: Which is the Best Way to Generate Random Number

Following are two commonly used methods to generate random numbers. My question is that which one is better and why? I will post your answer on this blog with due credit.

Method-1:

By using RAND () built-in function

DECLARE @n AS INT;

SET @n = 1000;

SELECT CAST(RAND()*@n AS INT) + 1

Method-2:

By using CHECKSUM built-in function

DECLARE @n AS INT;

SET @n = 1000;

SELECT 1+ABS(CHECKSUM(NEWID())) % @n