The gap you caught matters, and your instinct about what caused it is probably right. A two-mile radius pulls from a much wider range of properties than a single block, and in older urban markets like Cleveland, one block can sell for 20 percent less than the street two blocks over because of condition, ownership patterns, or buyer pool. That is not the agent being dishonest. It is a comp methodology that works fine for owner-occupant markets and falls short for tight investor analysis on a specific asset.
So what are you actually buying from an investor-focused agent when you already know the block?
Mostly not the comps. You likely know those better than most agents will. What the right agent adds is on the other side of the deal: getting you access before a property hits the MLS, writing offers that protect you (inspection language, due diligence periods, assignment rights if you need them), knowing which title companies in Cleveland close investor transactions without delays, understanding what a Cleveland fourplex lender wants to see, and negotiating from a position of knowing the seller's agent and what they respond to. That is the operational layer, not the data layer.
The problem you are describing is a general buyer's agent doing investor work. An investor-focused agent should be stress-testing your numbers, not just pulling comps. If the agent cannot tell you the difference between a one-block comp and a two-mile radius comp without you pointing it out, that is a signal about fit, not a signal that buyer representation is useless.
I would ask any agent you interview: how do you pull comps for a Cleveland fourplex specifically, and what radius do you use and why?
What does your timeline look like on this fourplex? Are you still under the original offer or did you step back?