For that practice, the test of a combined system is what happens when one of the 40 people hires the firm. The family relationships, the prior filings, and the consultation notes gathered beforehand are information the case will use.
In eimmigration, Pipeline Management shows where each person stands, from lead to prospect to client. For the case itself, the case management page describes a Case Creation Wizard that creates the case, gathers the necessary forms, builds the workflow, and assigns the legal team. The coordinator's question for an eimmigration demo is how a lead's record looks on the day the wizard runs, and what the paralegal assigned to the new case can see of the earlier notes.
In Docketwise, Convert to Client moves the person from the Leads tab to the Contacts tab.
The same test works in a trial of either product. Submit a made-up inquiry through the website form, log two follow-ups, schedule a consultation, and then open a case for that person. Count how many times anyone retyped the name, the phone number, or a detail from the consultation notes.