Resurrection isn't a great movie, but it is conceptually interesting, well-made (Junet puts interesting ideas on screen and Sigourney kills it in her new role, despite the shoddy Joss Whedon script that they are bound to), and it takes the franchise in new directions that are thematically relevant even if the tone isn't quite right. Resurrection can be looked at as part of the Alien Anthology or as part of Junet's filmography and there are some interesting gems in the film to find while viewing through either lens, despite the the film's problems.
AVPR is Suicide Squad level drek. It doesn't even feel like a movie; just a bunch of lousy, half-assed concepts slapped together by guys who had no idea what they were doing and shipped off to the theater. The only "good" thing that I can say about AVPR is that, from what little I remember, the Strause Brothers' second film somehow managed to be even worse.