Put the same work on both sides
Compare the inspection fee, parts, labor, return visit, removal, taxes or other stated charges, and any conditions. Mark an omitted item as “unknown” rather than zero. A $140 estimate that excludes a return visit cannot yet be compared directly with a $170 estimate that includes it.
Ask the provider to fill the actual gap
Write the differences as questions for the provider. “Does this total include the visit to fit the part?” is easier to resolve than “Why are you more expensive?” If one provider cannot confirm the problem until inspection, record the known inspection cost separately from any possible repair.
Send a question tied to the written estimate: “Does the quoted total cover fitting the part on a second visit? If not, what determines that charge?” Keep the reply with the estimate. If neither provider can diagnose the fault in advance, compare the known diagnostic arrangements separately from possible later work.
Check what the household is agreeing to
Note the proposed timing, how long the appliance may be unavailable, and who can authorize additional work. A slightly lower total may not help if the repair needs a week the household cannot manage. Decide which parts of the comparison are confirmed and which are estimates before booking the visit or choosing to replace the item.