Does the length of DPN matter?

i found two sets of DPNs on sale for an incredible price

one set is 6 inches long

the other set is 8 inches long…

are they better if they are longer or shorter?

I think it’s a personal preference, also a matter of what you’re making. I prefer shorter ones so they aren’t as unwieldy, but I only use dpns when whatever I’m making gets too small for a circ.