This is only when you view income in isolation. Negative Income Tax requires the person to work, while Basic Income doesn't. Moreover Negative Income Tax could support very unproductive jobs that the economy doesn't really need.
No, NIT doesn't require people to work unless you make that a specific requirement.
For example, if you have a negative tax of 25% on income below $40k, unemployed people on $0 income will receive a $10k tax credit. This is equivalent to $10k Basic Income with a 25% tax bracket up to $40k earned income, since in both cases people earning $0 get $10k and people earning $40k get $40k.
You could make it a requirement to work, but then people could just get trivial jobs for $1 just to get the tax credit.
However, there would likely be implementation differences in practice as a consequence of their framing.