The HH .357 does not leak for me, and I much prefer the performance of that to the 3-hole.
Don't get me wrong, if the 3-hole is a "better vape" to you, vape the hell out of it. But I didn't care for them in either long barrel or short barrel mode. Unless these have had substantial design changes (unlikely) since the first hit the market nearly a year ago, I'll stick with the HH line.
Do I exclusively use HH's? No. Do I prefer them? Yes.
I went back and forth on them for a long time, and even ripped a perfectly functioning one apart live on VapeTV. In the end, if you use these in conjunction with the instructions, you're going to have a great atomizer that lasts a LONG time. Outside of the one I intentionally ripped apart, I have yet to get less than 3 months of incredible performance from an HH. I cannot say the same for the 3-hole.
In the end, pricing and preference are king. Vape what you like!