Radeon RX 5700 XT vs Radeon RX 6600 comparison
According to the hardwareDB Benchmark, the Radeon RX 5700 XT GPU is faster than the Radeon RX 6600 in gaming.
The Radeon RX 6600 has a slightly higher core clock speed. This is the frequency at which the graphics core is running at. While not necessarily an indicator of overall performance, this metric can be useful when comparing two GPUs based on the same architecture. In addition, the Radeon RX 6600 also has a slightly higher boost clock speed. This is a frequency that can be reached if the GPU is cooled sufficiently and has enough power.
Next up, in terms of GPU memory, they both have the same amount of memory at 8 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.
In addition, the Radeon RX 6600 has a significantly lower TDP at 132 W when compared to the Radeon RX 5700 XT at 225 W. Heat output doesn't match power consumption directly but, it's a good estimate.
According to the results of the hardwareDB benchmark utility, the Radeon RX 5700 XT is faster than the Radeon RX 6600.