they are indeed different chips:
Graphics Card GPU Name
NVIDIA GeForce RTX 3090 SUPER GA102?
NVIDIA GeForce RTX 3090 GA102-300
NVIDIA GeForce RTX 3080 TI GA102-225
NVIDIA GeForce RTX 3080 SUPER GA103?
NVIDIA GeForce RTX 3080 GA102-200
NVIDIA GeForce RTX 3070 Ti GA104-400
NVIDIA GeForce RTX 3070 SUPER GA103?
NVIDIA GeForce RTX 3070 GA104-300
NVIDIA GeForce RTX 3060 SUPER GA104?
NVIDIA GeForce RTX 3060 Ti GA104-200
NVIDIA GeForce RTX 3060 GA106-300
source
in the table there they even add MSRPs (with question mark) that are equal to the regular versions and with the 3060 even equal to the Ti
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