Well, there are good and bad parts of both, but in my opinion, Precision (or some other Big Club system) works better when the opponents stay out of the auction (or only come in at low levels), and Two Over One works better when the opponents bid a lot.
I have a suspicion that Standard American is stronger than 2/1 in very, very established partnerships, but 2/1 is certainly better for a partnership that plays 100 or fewer sessions per year together.
So I guess in a perfect world I'd play a Big Club when the opponents are vulnerable and 2/1 (or Standard) when they're not.
Stay tuned -- I'll be posting some of my favorite defenses to a Big Club, including:
- Inverted Suction
- Inverted Psycho-Suction