Yes, a different nozzle filter can change the sound. A filter may keep dirt out, but it can also be part of the earphone’s acoustic tuning. Matching its diameter is not enough.
Two meshes can look similar and behave differently
The mesh, any backing material and the adhesive opening affect the acoustic path. The result depends on the driver, nozzle and the rest of the earphone—not just the visible size of the holes.
Replacing a blocked filter with the correct clean one may restore output. Replacing it with a different type may alter the balance, particularly around resonances. There is no reliable rule that every denser mesh produces the same change.
Buy for the exact model
Ask for the original replacement part or a manufacturer-approved equivalent. Check the model revision, filter size and installation method. A matching outside diameter does not establish matching acoustic resistance.
Only replace a filter yourself if the design supports it. Bonded meshes and filters located deeper inside a nozzle may require service.
Do not remove the filter as a permanent fix
An open nozzle may sound louder or brighter, but that does not mean it sounds more accurate. It also loses the protection that filter provided. Removing only one side’s filter can introduce a new imbalance.
Check surface cleaning first. If the filter is damaged or keeps blocking, use the repair checklist before ordering random replacement parts.