Which CSL do you have, the xbox one or the PS4 one?
What do you think makes the T-GT better or why do you prefer it in those games?
The reason I ask is I bought the T-GT and I wish I could return it and I was thinking of getting the CSL because the T-GT does not live up to my expectations. The main problem I have is the cogging, it is kind of like driving a car with a steering rack full of sand. I like the strength, I even like the pedals. I don't care for the vibration effect in GT Sport and it actually bothers me a bit because it doesn't feel natural or realistic to me. I thought it would add to the experience but I don't think it has been implemented well. I even tried switching to the "Other" Mode on the wheel but the base FFB doesn't feel the same in that mode which is also disappointing. The T-GT does feel really good with all my games and my main issue with it is that gritty feeling from the cogging so I was thinking the Fanatec CSL being smoother, having the load cell option and having the flexibility of user settings on the wheel would make it a much better wheel for the PS4 for the same money.
Mine is exactly like in the reviews.
I considered it might be the belt but the problem is my wheel has less cogging when it is switched off.
My T-GT doesn't have the same problem as your or the one in the review. Yes some cogging is there, and you can feel when is turn it off with small movment, but when I play it is fine.
I have the CSL PS4 elite with the F1 Carbon Rim and the V3. Plus I still keep my G29.
While I think that the Fanatec package is the better value for the money, because it has a way better set of pedals (either the Elite with loadcell or the V3), hardly you will go back to non loadcell brake, and the wheelbase is built greatly, I am not sold it of the beavhe on PS4. On PC there is no discussion. Get a Fanatec bundle and be happy, but on PS4 in my opinion it doesn't work at his full potential.
I will keep both the CSL and the T-GT. So this is what I think, the CSL is smoother, better built, better add on and better pedals. This should be enough for the CSL to be better overall on PS4 but I value more feeling and the feedback that a wheel gives you while you drive, and the T-GT (but even the T300), gave me way more information about the car and his behave that the CSL at the moment can give. This is what I value more and Thrustmaster product on PS4 are doing this better. Probably because they are there since the beggining of PS4 and the CSL is new and the compatibility is in progress. Take this as my opinion that you can disagree, not as a supreme thruth.
I have other friends in the league where I race that have the same feeling. Drivers that play both on PS4 and on PC with IRacing. One of them did keep the Elite pedals but sold the baseand went back to the T300 and the CPX. Take in mind that I use the the T-GT with the V3 (on PS4 via CPX), because the pedals are quite horrible.
In the end the Fanatec user gave you a better advise. Try yourself. I still think that the CSL is a great piece of hardware, and definitely I won't sold it, but on (only) PS4, at the moment, has some limitation.