I prefer the cable because the adapters design lets it disconnect very easily while charging.
The magnets are very very strong compared to the original sony ones! With both i can even lift the xperia z ultra without it falling off the cable. The original sony one disconnects directly.
The only think bugging me is the the charging port design:
the original sony one has a flat housing on the contacts side. This one has a "U" Shape (to support itself at the case). i think this could get problematic when using a case without much space at the magnet port.
I'd like to post pictures but my camera is currently not working. I'll upload some tomorrow!
I hope my English is good enough
//Edit: it worked now, heres the pic!