Very different knives and a ton of personal factors totally unknown to anyone who has posted, certainly including me.
RMD is longer, but with about same cutting edge length due to large choil Do you like large choils? Some do. Some don't. Your knife, not mine.
F-1 is VG-10 stainless laminated between softer (420J ?) stainless
RMD is excellent carbon steel. (Coating protects everything except area most prone to critical rust damage- the edge.)
Both companies reputation is for excellent heat-treatment of their products.
Do you want a stainless knife? Going to use it a lot around water? Salt water?
F-1 is convex
RMD is saber ground with secondary bevel and coating.
Do you find coated knives cut to your satisfaction?
Any experience with sharpening convex blades? Some dislike. Some say easy.
F-1 blade is slightly thicker.
RMD has larger handle. Which fits you best? How can we know?
Handle material very different. F-1's is significantly softer. Some posters do not like the handle.
F-1 spine better for scraping ferrocerium rods, but I don't know if you want to do that.
Does it matter that Swedish and U.S. military authorize purchase of F-1 for survival knife? That does not matter to me, but it matters to some.
Try to at least handle them. Hand tool. Maybe you did, but I don't know.
Which sheath do you like best? ^____^