I'm not much of a high end multi kind of guy so I can't compare the SF to the first 2 but I found PSGD to be somewhat similar to the Spiral. The words that come to mind are high energy for the spiral and muted for the titan.
The power level to me seems to be a good bit higher in the spiral vs the titan. The control is more pinpoint as well in the spiral. Overall, a nice surprise as I was not expecting much. If I remember correctly there are some more play comments on spiral in the early early pages of this thread but good luck trying to find them

They play very differently but equally well depending on what characteristics you want. I have not played with psgd in around 18 months so my memory is a little foggy, but I used it in an 03 tour and liked it alot. In fact, it ended up being the best setup I ever played with in that stick.