Sorry I can't answer you directly, but I have both the H53Fc and H53c. Based on the listed dimensions, I believe it is even smaller than the SC53, so that might be something to consider for you. Furthermore, I added some magnets on the pocket clip and I really think that it makes for one of the most useful little lights there is: it can be used as a flashlight, headlamp, and magnetic work light. I don't feel the need for the SC53 or SC5. But anyway…
Given that they use the same emitter as the SC53c and SC5c, I think I can help answer your question:
I'm a big fan of the frosted optics, especially for headlamp and indoor use. It produces a very nice beam for close and medium range use. The spill of the F is a lot brighter than the regular spot/spill, and you really don't lose more than one third of the throw. If you are worried that you might lose too much throw, consider getting some DC-Fix diffusion film and sticking it on the SC53c. It produces a slightly more throwy beam compared with the frosted lens, and is probably just as efficient.
In terms of tint, I like both. My H53c with DC-fix, even though the beam is smooth, there is still a tiny bit of tint shift with the hotspot more yellow and corona nice and rosy. My H53Fc has a consistent tint overall, but when I use the light in my house (which has white walls) after being exposed to house LED bulbs (2700 k), the light can look an awful green... BUT MOST IMPORTANTLY: when I'm using either lights as my sole light source, and my eyes have adapted to them(which doesn't take long), the tints on both are a fantastic creamy, almost light golden incandescent color. The beams make colors look amazing – grass, trees, and leaves especially, and the warmth is very pleasant.
I don't think you can go wrong with either, but if I had to use a straight angle and didn't own my H53Fc and H53c for my EDC I would personally get the SC53c and put on some DC-fix for minimum size. Since I have my H53Fc and H53c, I'm currently more attracted to the SC5c II for the extra output, and would probably put on some DC-Fix to make it and SC5Fc II.