A rebirth skill is always better than the original one since it's upgraded. However, it depend on what kind of eir you are.
Stage wise, it would be better if you get the new jog instead of the old one.
1)At lvl 1, rb jog gives more damage then the original one.
2)Rb jog have a sleep effect which can most probably ensure you a successful cast of jog in a middle of a mob provided there is no interference from mobs which didn't get affected by it.
Pvp wise, it would be better if you get the original jog instead of the new one.
1)The sleeping effect isn't long enough to prevent player from canceling your rb jog before you get your invincibility frames.
2)If you're playing with serious players, they will disallow the usage of rb skills, thus making rb jog useless.
If you're planning to max both, i suggest you not to do that since it will be a waste of sp.
All hail OS~