帮忙看看这句话谢谢

kodakharry

    Although no one has quantified changes in the rate of straying as a result of the disturbances caused by humans, there is no reason to suspect that the effect would be qualitatively different than what was seen in the aftermath of the Mount Saint Helens eruption.

帮我看看different than 是个什么用法？顺便帮忙翻译一下，谢谢！