Which app is better to replace Trello. Sprints or Projects?

We use Trello to track all our workshop jobs in the building. So, our company paints brake calipers and we use cards in Trello to represent customer jobs.

We use the lists to represent each stage the job us at physically in the building. Here is a snapshot of part of the process, although, there are 40 stages in total to our processes.

We use custom fields to display particular characteristics of the work required and to store customer information as you can see here:

We also use Zapier to trigger actions such as SMS and email notifications when the jobs join certain lists, which is able to use the custom fields.

I get the impression that either Projects or Sprints could replace this, but it is not easy trying to work out which would be better suited.

We like to track how long jobs spent in each area/process and who has done/moved what.

So I suppose that this is a discussion as well as a question as I am sure there is much that will be discussed that could benefit many Zoho users.

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Bug Viewer for Zoho Sprints
Project managers work on multiple sprints simultaneously, and given the potential for a number of bugs that can crop up, it is helpful if the bugs can be viewed in a single location. This is made possible by the Bug Viewer for Zoho Sprints extension.