1. Reaction Rate: The reaction between a strong acid and a metal will typically occur much faster than the reaction between vinegar (a weak acid) and the same metal. This can be observed by the rate of gas evolution or the formation of a product.

2. Gas Production: Strong acids react with metals to produce hydrogen gas vigorously. The reaction with vinegar, being a weaker acid, will produce hydrogen gas at a slower rate or may not produce noticeable gas bubbles.

3. Temperature Change: The reaction between a strong acid and a metal is often exothermic, meaning it releases heat. This can be felt by touching the container or by observing the temperature increase using a thermometer. The reaction with vinegar, being a weaker acid, may produce less heat or a slower temperature increase.

4. Metal Dissolution: Strong acids can dissolve metals more rapidly compared to vinegar. The metal may disappear or corrode more quickly in the presence of a strong acid.

5. pH: Strong acids have a lower pH than vinegar. The pH can be measured using a pH meter or pH indicator strips. A lower pH indicates a higher acidity and, potentially, a more vigorous reaction.

It's important to note that the specific observations and intensity of the reaction may vary depending on the specific strong acid and metal used. Always handle acids with caution, and conduct experiments in a controlled and safe environment.