I am not a fan of both of those types.
The reason is simply because the roots get severely damaged at the time of repotting.
I mean, you can get around it by carefully cut the plastic part into pieces, but why would I do that when I can just use other pots without so much hassel?
The best pot, as far as the drainage is concerned, at the ones with mesh bottom. I'm not sure if that is the term, but this pot comes in green, black and even semi-clear version, but all are square.
I wish they had it in round shape, but oh, well.
Anyways, this pot has the best drainage.
Any orchid supplier website usually carry them.