Need help differentiating elements of PC 22.01 and PC 22.07

Assault by threat under 22.01(a)(2) requires only a threat of imminent bodily injury; 22.07(a)(2) requires a threat of serious bodily injury.

22.01(a)(2) requires intentional or knowing conduct. 22.07(a) requires a threat to commit "any offense" involving violence with the specific intent to provoke a certain emotional reaction, in this case being "fear of imminent serious bodily injury."