In which way is the sound of violen different from viola?

The sound of a violin is generally brighter, higher-pitched, and more mellow than that of a viola. The violin has a range from G3 to E7, while the viola has a range from C3 to A6. The violin's strings are also thinner and tuned at a higher pitch than those of the viola, which contributes to its brighter sound. Additionally, the violin is played with a smaller, lighter bow than the viola, which also affects the sound.