Around 320 to 325C, works beautifully for me and my full convection setup.
According to the maker, the SV4 and SV6 are exactly the same in how they hit.
If you like heavy hitters, then yes it is worth buying.
If you like flavor and massive clouds and awesome effects, then yes it is worth buying
If you like almost zero maintenance and an extremely reliable vape, then yes it is worth buying.
It's my daily driver for the past year plus and the SV3 was my DD before that for years...