We don't know the CFR of the virus causing this outbreak. It is reasonable to assume that the CFR of monkeypox overall in Africa might be 1-3%, and to assume the virus that caused the 2003 outbreak in the US might also be about 1% (no one died, but 5 of perhaps 70 cases ended up in the ICU). If this virus has a CFR in that range, it's more severe than COVID.
But we've had 400 confirmed cases so far, and only one case (a child in England) is seriously ill. If the Senegalese outbreak really is due to this strain of monkeypox, with over 1000 cases and no deaths, this is not a 1% fatality rate virus. This outbreak certainly raises the possibility that the virus has gained an increased transmission rate in exchange for a decreased lethality. Are we missing milder cases as well? I'm not sure.
Both the rate and method of spread, as well as the fatality rate of this virus are complete unknowns at this time, and the correct response to this virus depends greatly on their answers.