You can't compare upvote numbers (or even upvote/downvote ratios) meaningfully between sites, because their communities aren't the same. Your proposed scenario

You can't compare upvote numbers (or even upvote/downvote ratios) meaningfully between sites, because their communities aren't the same. Your proposed scenario tells us nothing beyond pure numbers -- 100 people voted on one, 10 on the other. You can't say anything comparative. You certainly can't speak to strength of intent.