Which something are you referring to specifically?
TBH I think they just give some functions different names but ultimately all rely on the reputation system, eg. Malicious Sites Blocking and Infected Device Prevention and Block. I’m guessing the difference is just in checking source IP vs destination IP.
Vulnerability Protection would be the DPI part I mentioned
here.
And Router Security Assessment, well, don’t think that’s too useful but that’s just guessing from past experiences with similar feature on other systems, haven’t actually used the one in Asus.
Though I agree Skynet can’t replace all that’s offered but the only one needs replacing