T100 is a waste of money, imo. I would rather just play with the gamepad at that point. Atleast the X1 controller has haptic feedback, which is quite helpful. DS4 is ok i guess.
If you don't mind feeling like there is a toy built for an 8 year old in your hands, I'd say go for the T100. Otherwise, you might want to check out some of the older Fanatec wheels, they are PC, PS3/4, and some with 360 support also.
This aint too bad a deal right
here. This one will work on Pcars for PS4 currently, and likely more future racing titles on PS4 also as they stated they are giving out the drivers to any devs that want them, poosibly Driveclub in the near future?
Good luck!