Here are some of my LODs -(Cheaper): Gold? Audiotrak, Fiio L9, (Medium priced): Qables at the back, and my latest (higher end)LODs low rider Forza custom LODs in silver and copper.
Is there a difference?, well owning a few LODs I have to say yes, many other people would say no.
The differences are fairly slight although audible.
I preferred my copper Qables cable, but quite stiff and bulky, the audiotrak was great and transparent with nice highs, Fiio L9 nice low rider form, felt it couldnt handle volume though, a bit muddy.
My new Forza LODs (made to order) seem to combine the best of the above LODs, small form (like an ALO cricket), silver for nice highs, a copper one for more warmth when i am in the mood.
But of course you can see my new Fostex hp_p1 on the right (custom piccolino usb-lod cable by Head-Fier QUSP on the way) so I wont be using these LODs or the stack of portable amps at the back so much anyway