As adjectives the difference between sequential and nonsequential. is that sequential is succeeding or following in order while nonsequential is not sequential; not in any regular sequence.

What is non-sequential?

: not relating to, arranged in, or following a sequence : not sequential a nonsequential narrative style a nonsequential list of serial numbers.

What is the difference between sequence and sequential?

Things in sequence, or regular order, are arranged sequentially. Most novels and films move sequentially, but some use techniques such as flashbacks that interrupt the movement forward in time. Sequential courses in college must follow each other in the proper order, just like sequential tasks or steps.