They are pretty different. Not sure how long ago your dd did so. Maybe the routines were not as different in the last cycle.
Differences between level 4 and 5 floor:
Level 4 faces away from the corner and level 5 faces in, because level 4 does a jump 1/2 turn and level 5 does a jump full turn. Otherwise the poses in that corner are the same.
Different tumbling pass...5 has two front handsprings
Choreo after FHS to the "pops" is the same, then level 4 does a run to a skip, and 5 does a run to a punch front.
Then the choreo is the same again, level 4 does a back extension to lunge and level 5 does it to a kneel...then they go into the same splits section
When standing up from the split section, level 4 just reaches up, and level 5 does a small inward arm circle. A lot of coaches seem to have missed this distinction anyway...
Leap pass can be the same, or level 5 can do a switch leap
Level 5 doesn't have a back walkover, so there is one less step into the cross step, otherwise the same into that corner
Level 5 does a back tuck instead of a second back handspring and has a little more music on their ending poses and don't have to stay on their butt.
Might seem like a lot but it's basically the same exact routine with a few acro changes. That only dance change really is the inward arm circle standing up after the splits, which if you did the same thing for level 4 and 5 there would be a minor text error.
As long as they remember to do a jump full turn, level 5 tumbling passes, go to their knee on back extension, and no back walkover they'd be fine.
That said I'm sure many on here won't be surprised to find out I think it would be absolutely unacceptable to even consider skipped a level when scoring low 8s and mid 7s. Nope nope nope.