Speaker jumper cables--a type of sound?

I can't seem to find any reviews/comparisons that focus on sound differences(warm vs.neutral) between various jumpers for speakers. Maybe because the conclusion is really that obvious---that manufacturers' jumper cables sound similar in tone, at least, to their speaker cables. Do any of you mix one brand of speaker cable with a different brand of jumper cable? With what results soundwise? Thanks for any data, insights or impressions.