Hi @m0gduck,
some of the old options are not available in the new blender 2.9x versions. That’s bad, but the CGCookie-Staff keeps updating their courses to blender 2.9 as far as I know. Maybe you have to wait some time, until they come around this cours.
About that snake hook, there are a lot of settings that can be changed like the “Fall-Off” curve. Maybe he made a change that is not in the video. Another point for this difference can be that the “Strength” of that brush is set to depend on the pressure he uses with his pen. Next thing to keep in mind is the topology and the amount of geometry. Are there more vertices? Is he using “Dyntopo”? Stuff like that can cause these issues.
For me the best practice is to pause the video and try to get the wanted result e.g. doing more strokes than the tutor since one stroke doesn’t do the exact same what the tutor was doing. Changing the strength of the brushes or the detail size in Dyntopo are also options that I try.
I’m not sure if this is helpful, but I hope so.
Greetings,
tobles