rope skipping sounds easy, but its harder to do it for a long period, and the definition of long period rope skipping for starters is around 3-4 mins.

all it takes 1 minute of pure jumping, and its likely youd be out of breath.

but yes, if you can do it for 15 minutes, it would burn more calories than jogging for 30 minutes.

jogging hurts ur knees if u dont land ur foot down properly. plus the correct type of shoes massively decreases the chances of you hurting ur knees in the long run, so is the type of surface you decide to run on.

skipping is essentially the same thing for newbies, since you cant control ur jumping height correctly, you will tend to jump higher sometimes and lower sometimes, and you'd be too busy to try and land down properly. In the end, skipping also can hurt ur knee joints.