What kind of wheel will you use? The wheelstandpro for the G27 comes with a shifter adapter included in the price while the Rennsport it's an additional $59 so add that to the cost if you have a wheel with a shifter.
I've never used the Rennsport but I think I've read good things. I've owned a wheelstandpro for 3 years and love it. Very sturdy and well built. Their customer service is great and everything is handled quickly. I originally bought a DFP wheelstand pro and upgraded it to a G27 version a few months back. They sent me the wheel plate, shifter plate, and the bar to hard mount the pedals and I changed it out quickly myself. I've since gotten a T500 RS plus the shifter and it all works great on my wheelstand pro that started out as the model for the DFP/DFGT. I thought that was pretty impressive when you consider the size of the T500.
