So, here's the comparison between a black base and white lines zebra nail art and a white base and black lines zebra nail art.
I think that the advantage with a black base could be that it could be done faster. White polishes tend to need 3-4 coats and black ones 1-2 coats (in my point of view); minimizing the drying time and work load ;). Sadly I've lost my fabulous L.A. Colors Art Deco - white somewhere but I'll buy a new one for sure! :)