Gregozedobe
Enlightened
I have a H51 and an SC51 (and H51F, H501x2, SC30, SC60), so I can use either.
I found I couldn't get comfortable walking along with the H51 in my hand. It was fine as a headlamp (excellent in fact if you want some throw), but not as a hand held light. When I grab a light to use to shine around and see what is out there I always seem to grab the SC51 in preference to the H51.
I don't think the location of the switch makes much difference, both seem to turn themselves on if I carry them in my pocket without unscrewing the tailcap. In fact if I carried the H51 in a vertical position (switch up) it would be more likely to turn on (that's why I stopped EDCing my LF2XT).
My suggestion is to buy both, then sell the one you like least on CPFMP. Honestly, you are the only one who can say which one you prefer, and until you give both a decent try out you won't know which one suits you best.
I found I couldn't get comfortable walking along with the H51 in my hand. It was fine as a headlamp (excellent in fact if you want some throw), but not as a hand held light. When I grab a light to use to shine around and see what is out there I always seem to grab the SC51 in preference to the H51.
I don't think the location of the switch makes much difference, both seem to turn themselves on if I carry them in my pocket without unscrewing the tailcap. In fact if I carried the H51 in a vertical position (switch up) it would be more likely to turn on (that's why I stopped EDCing my LF2XT).
My suggestion is to buy both, then sell the one you like least on CPFMP. Honestly, you are the only one who can say which one you prefer, and until you give both a decent try out you won't know which one suits you best.