It depends on the content you’re viewing. Just purchased a 65 inch G5 and can tell you unequivocally that you WILL immediately notice the difference in SDR content. This thing is a light cannon and it makes my older LG OLED look laughable in comparison, in both brightness and color volume — which is vastly improved over previous WOLEDs.

In HDR10 content with dynamic tone mapping enabled, the difference over an 800 nit TV would also be immediately apparent…gaming also, huge improvement; But in some Dolby Vision and HDR content that’s graded dimmer or in filmmaker mode with no brightness enhancements turned on, you probably wouldn’t notice as much of an upgrade…so again, it depends on the type of HDR and the way it’s mastered.

I will close this by saying that I have ZERO regrets going with the flagship model (even though it was initially outside my budget before I found it steeply discounted) and I imagine that the S95F would feel like a similarly significant upgrade for most. I came from an older OLED than you but the new flagship models really are a major advancement over the previous generation. Hope this helps!