'03 yz/wr450 cylinder question

i am looking at buying a cylinder. Its advertised as a 2003 / 2003 yz or wr 450 cylinder head.

The part number for the 2003 YZ 450 cylinder is 5TA-11311-00-00

The part number for the 2003 WR 450 cylinder is 5TA-11311-10-00 (replaces 5TA-11311-02-00)

they are close but not exact. Does anyone know if the '03 WR cylinder is interchangable with the YZ450 cylinder? If not does anyone know the difference between the two?

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