Its more a matter of preference i think. They both do the trick.
Cable tends to need more wattage compared to tape, or so i've heard.
I prefer tape. because its flatter, and seemed the best choice for me. (racks & terrariums)
Then again, in my incubator its all cable, because one cable filled the whole thing up.
They both need control ( dimmer or thermostat)
cable might be a bit cheaper because of the length. (depending of what you want)
And they both can malfunction.
I have cable on my adult racks and tape on the hatchling racks. I think I prefer the wider surface area of the tape but I also think it's a matter of preference. They both pretty much work the same way.