Compared with the non-SUPER version, the new GeForce RTX 2060 SUPER has 2GB GDDR6 memory more, more CUDA cores, a wider memory bus, and a higher base frequency. It has 2176 CUDA cores (256 more), a 1470MHz base clock (+105MHz), 1650MHz Boost (-30MHz), 14Gbps memory clock (unchanged), 8GB GDDR6 memory (+2GB), a 256-bit memory bus (vs 192-bit), and a 175W TDP (15W more).
This results in an MSRP of $399, which is $50 more than the regular RTX 2060.