Iāve written a detailed comparison of Postmanās mocking capabilities vs. MockLabās:
https://www.mocklab.io/blog/postman-mock-server-vs-mocklab/
For full disclosure, Iām the creator of MockLab, but Iāve endeavoured to make the article as fair and balanced as possible.
Please let me know if this is useful, has things missing or if you have any other feedback!