Sorting by TestCase ID

Hi there!
I am developing a report with Insight with RQM data.

I was wondering if ids (e.g. TestCaseId or TestSuiteId) are created incrementally or if they are created just randomly.

If they are created incrementally, it could be possible to sort by TestCaseId instead of CreationDate, right? That would produce the same sorting order.

Notice I am not talking about the integer id e.g. '405', but the 'itemid' e.g. '_b12hj4k432bk42'

Thanks in advance!