Paper and reusable metal filters do not provide identical filtration. A metal filter generally allows more fine material into the drink, while paper often produces a cup with less visible sediment. The exact result depends on the filter, grind and brewer, so material alone cannot predict the taste.
Use a familiar coffee and keep the dose and water quantity constant for a comparison. Notice body, clarity and the finish as the cups cool. If one filter changes the drawdown substantially, adjust the grind deliberately rather than assuming the first attempt represents that method at its best.
Maintenance and recurring supplies also matter. A reusable filter needs thorough cleaning; residues can complicate later comparisons. Paper requires the correct size and an ongoing supply, with rinsing handled according to the brewer's instructions and your preference. Choose the balance you enjoy rather than treating either option as universally more professional or turning filtration differences into unsupported health promises.
The conversation
A good question can make a better brew.