I have been thinking about this, if playtime is even the right metric for these types of games. I'd argue it's more about how often you come back, how many sessions you have, whether there are scenes worth revisiting. A shorter game you return to regularly beats a longer one you play once and forget.I can't agree on that. I finished my full playthrough in exactly 5h 47min and had like 139 saves, as I like to save quite frequently.
Obviously YMMV depending on what you're into, but I'm curious: how's the replay value in your experience? What's your shot-counter?