Do you urgently need a new GPU? I would recommend waiting for the new RTX 30 series to release and see if anything there is cheaper than these options, if not, there will be a ton of used RTX 20 series cards from people wanting to upgrade, which will sell for a lot less.
If you are keen on buying these GPUs, go for the regular RTX 2060 and overclock it to get about the same performance as the Super. Use the OC scanner feature in MSI Afterburner. It's completely safe, it will tell you the most stable Core overclock. Then overclock the GPU memory in Afterburner in 100 MHz increments until it isn't stable anymore. Find the right memory overclock and you're good to go.
Of course, only overclock if you have a decent PSU. What is your PSU? What are your current specs?