Sorry, I had the SSD in before I started with Trainz. (both my iMac and MBP). I've only been a "Trainz-er" since Oct. Since Trainz does so much pre-cacheing I don't know if it makes a difference. I can say, it made a very noticeable difference in my every day Mac work. My "open with" (right click on file) contextual menu would sometimes take 5-6 seconds to "scan" and present the options (apps)... now it is almost instantaneous. That's just one of many practical examples.
btw... I see I do have PM's. Sorry, haven't been on forums for a bit...