Your expecting them to act the same. Each snake has its individual personality and preferences!
I would still say I personally think it sounds like a neuro issue a ball python should be able to stretch on a perch without corkscrewing. If it’s a neuro issue this maybe the only time you notice it but it’s always “there”
That’s good but I personally think 89 hot side is to hot for ball pythons. This is my opinion plenty of other people keep them at this temp.