Why would a ratcheting T handle be advantageous over say a ratcheting screwdriver? I kinda like the stubby T handle but I have the rat. screwdriver and like it.
For me personally, I use both the regular and stubby ratcheting Snap-On screwdrivers every day, but the ratcheting t-handle I have found is better suited for small fasteners using either a bolt head or cap screw head where you need the extra leverage as they are often torqued to a higher in/lb or ft/lb. Think automotive interiors, dashboards, intake airboxes and medium to large electronics and appliances. 1/4" Ratchets will work, but i find them clunky and the swing often get cramped in tight spaces.
For philips head and slot head screws, the std. screwdriver is very adequate.
As I stated above, if you use it every day and depend on it for your profession and thus paycheck, I still suggest the snap-on for ease of warranty and replacement parts. But that's just me.
If used occasionally, teh Williams is more than adequate.