[electronvolt]

I'd argue that they pretty clearly are different, if you're talking about generic laziness-as-a-quality versus subject specific laziness.

Someone who isn't interested in school might be willing to work very hard at improving in a sport, or work very hard on their extracurricular club, or work very hard to teach themselves assembly and programming, or to learn a musical instrument. They might even be willing to work hard to teach themselves math, but be uninterested in putting effort into math class.

I guess it depends on if you consider "laziness" a universal character quality or not.