Silver Efex gives completely different results than PhotoLab. We’ve already been through this before.
PhotoLab is very powerful software and with enough trial and error you can come close to matching Silver Efex on a single image. The BW “digital emulsions” in FilmPack look like desaturating a colour photo, not like a BW photo/negative. They are more or less useless.
If you have access to any version of Nik, use Silver Efex for your BW versions, unless you are a masochist or prefer desaturated colour images instead of credible BW renderings.