Quoted from woody76:
I am leaning towards pinshaker, first to post/announce and his game selection is superior so far.
Guess it's going to depend on how a person wants to trigger the shaker, and how granular they want to get as far as customizing those triggers.
Differences from what I can see:
Pinshakers:You can turn on or off up to 8 individual triggers for the shaker. Comes with 2 different wiring harnesses (you only using 1 at a time) - and you use whichever harness gives you access to the set of triggers you want to use.
In the AFM example Robert posted (https://pinside.com/pinball/forum/topic/introducing-the-pinshakers-universal-plug-amp-play-shaker-motor-kit/page/2#post-5115452) it looks like you would use Harness "A" to trigger off of different flashers, or Harness "B" to trigger off of solenoids (slingshot, pop bumper, etc.)
But it's an either/or situation - if you wanted to use the ramp flashers and the pop bumpers as triggers, it seems like you're SOL.
PinSound:Triggered by sound calls (at least if you're connecting through their PinSound board.) Set a trigger for a low haptic rumble when Rudy starts snoring in Funhouse, and a different shaker intensity (or none at all) when he's talking.
PinSound says they'll release configs every week for different games, but if you've used a PinSound board you know the real fun (and frustration) is in making your own configuration.
Initially, as I already have a PinSound in the machine I want to add a shaker to, I'll likely go with PinSound as the customization options seem far greater. Of course if there's an instance where a flasher or solenoid trigger might be more appropriate, why not a 2-shaker machine?