1up has an active thread right now on a switchable 4-way/Q-bert stick. Here's a relevant quote from that thread that directly applies to your inquiry:
"...In my opinion, the T-stick sucks. The twist-to-convert mechanism is brilliant, too bad it's not on a different joystick. But it has about 1/4" throw in any direction, which is too small for any good Ms Pac-Man action, and really not good if you have any wrist pain.
The absolute best balltop for maze games is the J-stick, with a medium throw, light spring tension and a nicely shaped restrictor, this is the stick that won out in heavy playtesting by many different people, and I tried everything from a T-stick to an E-stick, to a super with a balltop hacked on. Everyone absolutely loved this stick during our office-wide Ms. Pac-Man playoff! The light spring tension makes for quick turnarounds when the ghosts reverse direction, and the perfectly rounded restrictor gives positive feedback when you hit the corners, but never sticks when you make a turn. 1UP approved!"