I don't really disagree with the reviews themselves (don't have a PSP so can't really judge these), but I do want to weigh in on his comment that "Family Guy" is features more sophisticated humor than South Park.
I would disagree. South Park can fool you with its extreme, over the top presentation, but that in fact hides a very sophisticated show. They almost always say something very interesting and thought provoking with each episode (especially true after the first few seasons).
For example, there is an episode where Chef wants to ban the South Park flag, because the flag has (in usual South Park extreme presentation) a depiction of a lynching. Clearly a comment on the confederate flag issue in the south, the show goes a totally unexpected direction by the time it ends, and it really makes you think. Most South Park episodes are like this.
They do occasionally go over the line from time to time, but you have to be able to take that in order to appreciate the show.
I like Family Guy. But whereas South Park always has a story with definable beginnings, endings, and conclusions, Family Guy is a mash up of gags, with all of the various Peter Griffin "That Reminds Me Of The Time..." bits. The jokes are usually quite predictable, the sort of stuff I was used to hearing when I was in college. Still very funny, none-the-less.
South Park even did a whole two part episode lampooning Family Guy, where it was discovered that the show was actually written by manatees who randomly dropped balls with jokes in them down shoots in a water tank, which I thought was funny, since Family Guy is seemingly random.
Anyway, not to go on too long (too late!), I like Family Guy but I don't think it is more sophisticated than South Park.