A lot of replies about different tips, but I see very few that adresses the fundamental issue.
Generally a jump tip benefits from being very hard, while a break tip is also much harder than a playing tip, you don want a certain amount of control, so these things will always be at odd with each other. Obviously you can choose to lean one way or the other and for jump/break cues, most lean in favour of easy jumping. With todays cut break in 9 ball, mostl players are moving away from the super hard tips as power isn't the issue, control is. So a Samsara, Kamui SAI, Gator etc seems to work well for the vast majorety of players, for jumping someting like the Mezz Tsubasa, Horo White Diamond works well. One of the tips that can to a certain extent serve double duty is the Tiger Ice breaker and the Old Taom 2.0's
My recommendation will always be the same: Have a separate break and jump cue, they do very different things. The extra 400g a jump cue weights makes no real difference.