I do not have an answer to your question, but I thought I would share some insight I have had after getting my Poker II.
I went from a Logitech G710+ which has MX brown switches and abs keycaps with orings, to a Poker II with brown MX switches. The poker is so much more comfortable to type on and is far more silent. It really feels like I'm typing on different switches and the only thing which separates the keys is the keycaps. PBT keycaps make such a huge difference with regards to the typing experience.
Having said that, people buy keyboards for very different reasons, so if the aesthetics is of higher importance to you, then by all means use ABS. Just make sure that you try PBT keycaps before making the decision.
Hope you find something you'll be satisfied with.