I have a Samsung Dual cook, quite a few years old now. It's coming to the end of its life, few glitches with it. Thinking of replacing with a Dual Cook Flex, possibly the NV75N7677RS.
Downloading the manual and searching on the internet doesn't give me the answer but can you grill on the top and use the oven below at the same time? On my oven, I select top or bottom, then use the dial to select the function. It looks on the videos that the function is selected first and top and bottom use the same function. One function I can see is the grill but it infers that it's just the top and nothing can be set on the bottom oven.