This is a comparison between RB XT910 and RB XT970 as daily driver pad. RB XT910 is part of the Racing Brake BBK upgrade I installed a month ago. You can read about the brake job here. The caliper is a 4-pot just like stock P3 Brembo caliper. Unlike Brembo with a pair of same-sized pistons, RB caliper has pistons of two different sizes, this will help reduce uneven wear of brake pad, but not much on the brake bite and modulation in a significant way. The bite and modulation are mostly factors of the brake pad. In this regard, the XT910 is a vast improvement over the stock P3 pad. The initial bite is distinct while the release is crisp. The modulation is very linear and predictable with slightest pedal travel converted to increase braking force. By feel, there is about 20% more braking force for the same amount of pedal travel. The dust level is slightly higher than stock, with medium grey dust. There is zero noise. With about 600 street miles on XT910, I would highly recommend this pad for better brake feel and performance if you don't might a bit more dust. I've not tracked this pad, but according to RB and review on GTR site, it is a capable pad for the occasional track days. Two days ago I swapped the XT910 for XT970. Wow! The stopping power on these is highly addictive in a similar way to the acceleration of P3. The bite is even more aggressive than XT910, but still very controllable once you learn the characteristic of the bite. With the stock pad, it is a whole foot operation, XT910 is a three toe operation, XT970 is a big toe operation. The most impressive aspect of XT970 is how fast and easy is to bring the speed down from 70 to 50 mph. This would be the pad that I use at the track, but I would not use XT970 as daily street pad due to its noise. The noise happens when you engage the brake from a creeping speed, but not above it. That is every traffic signal, parking lot, stop-and-go traffic, you will hear it. There is more dust with XT970, but it is not overly so. After close to 100 miles on XT970, I decided to swap back to XT910 for street, as I can not bare to hear the brake squeak on a daily bases, nor my wife asking me why the Tesla is so noisy. I do plan to swap in the XT970 at the track since it is easier to change the pads on RB caliper than removing the wheel. A simple 5mm Allen wrench is all it needs. Read about track comparison of XT910 and XT970 please read this GTR thread. FYI: XT970 and XT960 have the same compound; the difference is only in the vehicle application.