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  • I guess "It Depends". I did a test of both on a 10 Million row, 5.2GB table where the average row size was 530 Bytes and the NEWID() method was 51% faster and used 40% less CPU than the CRYPT_GEN_RANDOM(10) method.
    – Jeff Moden
    Commented Jun 17, 2023 at 18:18