I can't jump rope as long as I can jog, because I always fuck up and trip over the rope. I will say this. It's easier to jog at extremely low intensities than it is to jump rope low intensity. On average I'd say running of any type will raise your hear rate more. That being said, if I jump rope I'm going almost as fast as I can jump rope, because that's the easiest speed for some reason. It's easier for the rhythm.
The site is decent. It's obviously not completely accurate as it also is for the average person of that weight. More muscular people are burning far more calories on average than what this site will say. Also, there are just so many things to consider when exercising that could cause for different amounts of calorie burn. I just use it as an decent guesstimate and to see what my maintenance calorie intake should be.
The education system is fucked up here. I dropped out of school for that reason. It was either work and make money, or go to school and work(won't have near as much time and make far less money) and be completely broke and in debt. Which one makes more sense?