My friend Nick/Doc has posted a thorough comparison of Farsight pinballs on Steam vs theones from AppStore. I urge all of you to hop over to Doc's and read that article.
Concerning the difference in quality between Steam and Apple versions
I have observed the same effect between iOS and OSX. My guess is that it has something to do with the graphic card and its driver: I got the washed-out colours only on some of my iMacs. On the iPad (and also on the iPhone) all is OK.
Concerning the more powerful flippers, I am not surprised. Farsight flippers are lousy and probably the Farsight people themselves ended up by realising it and doing something since they were preparing a new version of physics, specific for Steam.
Ah, if only Littlewing hadn't folded...