There are many different Speeder models. The one seen most often is the 757. Its an excellent shaft, plays pretty much to flex. Some of the Speeder models can be brutal to play with for us mortals but if you generate 90-100mph driver swing speed then a Reg flex 757 should perform well, and stiff over 100mph.
The titleist speeder in the 905R is weaker I believe. It's made for titleist by fujikura it isn't a pure fujikura speeder shaft. Trying to work out how stiff it is.
Titleist Speeder is a mid weight shaft with a mid/high flex point, medium/stiff tip and soft/medium butt. Plays softer than the Speeder 757 and performs well for aggressive players with quicker tempos seeking a mid weight shaft with a medium trajectory and spin.
I've played both the titleist speeder and the speeder 757. Both are excellent, and feel smooth. The 757 is a bit more demanding and for higher swingspeeds maybe 105mph+. The Titleist Speeder gets denounced by some as not being a 'real' speeder as it was developed to be a cheaper option than the 757. However, I think it is a very good option for those swinging about 100mph with their driver. Probably comparable with the V2 stiff and NV stiff in terms of target audience, but gives a smoother feel than both.