No @Ankur Bawiskar 
There are two scenarios incident create integration should call also if incident updates(some fields) only integration call should happen and update the record.

Now one flow i have done for creation and in the response i am bringing the id and setting it in the corelation id successfully.

Now i want to build a flow for update i created a flow and condition as (additional comments changes or state changes etc) which is fine i want to know now which all fields got changed so that accordingly i will build the payload.

Also i have the question can both of these flows can be clubbed into one as we have a record trigger condition as created or updated?

so basically i have two questions how i can get the changed fields which all got updated accordingly i have to create the update payload .
and the second question is if i can club both of these to create or update what all conditions need to be made so it will work fine or it's better to keep separate only?