if someone doesnt tighten something enough, or course it may leak. theres the possibility with either zip ties or worm clamps. thats user error.
common sense is tightening too much and shredding your hose with a worm clamp.
when i tighten my zip ties, i get them tight enough so that the top of the zip tie is about even with the tubing on either side of it. that takes a lot of tuggin with pliers, and i have 100% faith in my zip ties. when i looked at hose clamps, they were around $2 a piece so i went with zip ties. the first ones i had sucked and broke when i tightened them. i got some beefier ones and they are doing very very nicely.
in fact, i changed from a dtek WW to a LRWW. the barbs on the old block were bigger, so the tubing was stretched out, and was loose on the LRWW barbs. it leaked with the older, crappy zip ties that i could tighten enough, but its now double zip tied with the beefy ones and hasnt leaked at all. i will post pics of how deep my zip ties are and the diference between the 2 styles of zip ties if anyone wants