I'd think about what color my skin tone is (warm or cold) and what undertone are the colors of the clothes I wear most often (warm or cold) if I had to decide between the two. They're otherwise very similar and you can't really go wrong.
Look at the veins on the underside of your wrist, if it's
cool - blue/purple
warm - green
neutral - blue/green
I am not an expert with the colors so maybe someone can correct me but I thought it was the other way around, that the casaque is the cooler one and the rouge de coeur is the warmer one. (this is based on the color that looks like my own rouge de coeur bag)
I have a warm skintone and I have a rouge de coeur bolide 26 ghw that works well for me (which I do wear mostly in the summer). But I also have deeper burgundy bag (not H) that I wear when I wear cooler colors, so it's just a way to help you decide if you're having a hard time. There's no right answer at the end, it's personal preference