Cambions are Tieflings with wings. There's like zero distinction.
Well - I kinda doubt it.
Cambions tend to be more powerful as most Mortals. Tieflings are around the same.
Cambions seem to be unable to leave the Nine Hells without being summoned by a Mortal first. But Tieflings do not need this.
Cambions are loyal to the Nine Hells while Tieflings seem to feel no personal attachment to it.
I also believe Tieflings are not truly accepted as Infernal beings, or are seen on the same level as those little flying Fiends and stuff. Aka "tu~raa~ash" !!
And maybe this is just me but Cambions always seem to have a red or purple skintone ( with Wylls Devilchicka included ).
But Tieflings variety into a wider spectrum of colors.