Well, in my opinion, the PTs are better for rebuilding, so I'd go with them.
They're easier to rebuild, imho, as you don't have to fiddle with taking out the wick from the long chamber, hoping your legs stay in tact, that you don't pull out the cartomiser-like "inner-lining", etc. With the PTs, you can just tweaser out the cotton, dry burn, and replace.
Additionally, re: rebuilding, that cartomiser-like "inner-lining" that holds juice, so you're stuck with that head if you're switching juice. On the PTs, you can empty the juice, take out the wick, dry burn, replace wick, and you're good to go with a new flavour - all while keeping the same head and without touching the coil.
Just my two pence.