Different arp cmd implementations produce differently formatted outputs: some format mac addresses so that its elements always include leading zeros e.g. 00:0f:b1:3c:d0:0f, some others omit those e.g. 0:f:b1:3c:d0:f.
I would rather have standardised output so that e.g. if you want to check for a presence of a certain device in the network you can do simple string matching regardless of arp cmd implementation.
Different arp cmd implementations produce differently formatted outputs: some format mac addresses so that its elements always include leading zeros e.g. 00:0f:b1:3c:d0:0f, some others omit those e.g. 0:f:b1:3c:d0:f.
I would rather have standardised output so that e.g. if you want to check for a presence of a certain device in the network you can do simple string matching regardless of arp cmd implementation.