The practical difference is supervision and accountability, not skill. A broker carries legal responsibility for trust funds and for the conduct of everyone licensed under their brokerage, while a salesperson or associate broker operates under that umbrella and that oversight.
For a client, the category does not change your protections. Regardless of title, Saskatchewan closing costs, commission included, typically run 4 to 6 percent total, and that figure is negotiated with whichever licensee you hire, not fixed by category or set by SREC.
Joel Dyck is licensed as a REALTOR® through Real Broker SK Ltd. and can point you to exactly which category any agent you are comparing him to holds. Get your hand-reviewed valuation from Joel Dyck.