I know the physical difference, but I was wondering what the differences is when you are fishing them.  When do you choose one of the setups over the other, and why?  

C-rig is for deeper water and when you're "searching" for the bass.

T-rig is for a weedless presentation like punching heavy vegatation and stuff.

I'm sure other people can define it a whole lot better than that but that's it in a nut shell.

8-)

I use a C-rig when fishing deeper water,like weed lines,points,humps,sunkin islands. The T- rig you have more control to flip,pitch or cast around docks,boats,slop,pads,or shallow weeds. Just my 2 cents worth.

I like C-rig in deeper water. Also I perfer to use this lure on windy days. I feel lke I can remiain in contact with the bottom better.

c-rigs typically cover water faster, and t-rigs are a little more versatle

I fish a Texas Rig as deep as 30'; a Texas Rig is used when the bass are within 2 or 3' of the bottom. Most generally a Carolina Rig is used when bass are within 3-8' of the bottom.

The only huge advantage of the Texas Rig is matted vegetation; both can be productive fished fast or slow; shallow or deep.

x2 what Catt said. Explained well.

I like t-rig around cover and pitching into cover, and c-rig for deeper water

I don't C-rig much, but when I do it's to cover a lot of deeper water quickly. It's also a excellent presentation on windy days.  For shallower search presentations I much prefer crankbaits and spinnerbaits.

Tx rigged plastics are mostly used for pitching into specific spots.

TX Rig ans C-rig are very different.

TX Rig is more of a verticle presentation. I usually Tx rig to flip or pitch specific targets or to fish stump fields or grass edges. I usually just fish it with a 1/4 oz or 3/8 oz bullet wt. If I'm flipping bushes or grass, I'll peg the weight.

Carolina rig is my go-to presentation in the Spring and early Summer to cover water and locate fish. The great thing about the rig is that you can feel everything that's on the bottom while moving fairly quickly. Carolina rig is more of a horizontal presentation, while keeping bottom contact. It's also a great tool for fishing off-shore structure fairly deep.

I'm like Catt, I fish t-rigged lures deep and shallow. The t-rig has it's advantages around wood. I also may use a c-rig shallow with a shorter leader when I am fishing shallow structure such as feeder creeks and shallow roadbeds. My main reason for a c-rig is that fish will hold onto it better when they seem to be spitting or short striking the t-rig. James Bitter explain something to me while I visited Florida. He showed me a large 1 1/4 oz. tungsten sinker that had been painted. While looking at it he explained that the fish eat a t-rig sinker and all. The sinker didn't have much of it's paint left from where it had been used with success. Now the once given advice to use a c-rig when the fish were short striking a t-rig made more since to me.