So is all that worth the extra $
KS6300 don't have wide colour gamut.
It does techically process HDR10.However for HDR to actually improve the image you need a wide color gamut.While this tv technically can process HDR it doesnt have a WCG so the HDR wont actually improve the image.Only expensive high-end tvs which do have a WCG have wonderful HDR which improves the image quality of HDR content.
there are two different types of HDR premiums, one is the fake HDR and the other is the real deal. the fake one is called HDR premium and the real HDR is called ultra HDR premium. anything that can read HDR data can be called HDR premium but in order to be called ultra HDR premium you have to meet certain requirements. this TV is not a true ultra HDR TV.
UHD is fake 4k HDR
SUHD is real 4k HDR
Fake 4k tv is just to upsell a TV you better off getting a good 1080p TV than waste your time
Unless the Samsung model number is KS8000 and above then it's not real 4k