Anyone know the difference between like the below 3 optics.
J4858C, https://www.optcore.net/product/hp-j4858c-compatible-1000base-sx-sfp/
JD118B, https://www.optcore.net/product/jd118b/
453151-B21 https://www.optcore.net/product/hp-453151-b21-compatible-1000base-sx-sfp-transceiver/