Rude Brittania's Amateur House Party is basically a one-and-a-quarter hour-long orgy (double that for the DVD which features Volumes 3 and 4), featuring a ratio of girls to guys that's roughly 2-to-1. The atmosphere is relaxed, and the chatter is high. But that's where the comparisons between the two ends.
Volume 3 features Nicola Holt, who (according to the box cover) appeared in UK TV's Big Brother. The girl has a shaved head and is the most vocal of the bunch. She, along with some of the other girls, takes it up the butt. The heat, however, is pretty minimal. Understandably, these folks are, for the most part, amateurs. So there is certainly a degree of novice pressure to do a good job and look good for the camera. Unfortunately, fucking for the sake of the camera instead of fucking for the sake of pure fuck fury doesn't lend itself to the very best stroke material.
Volume 4 features Alicia Rhodes, and the difference is remarkable. Alicia seems to inspire everyone involved to kick it up a notch. The action is more intense. The camera angles are far superior. And instead of the orgy being a combination of disjointed sex acts, everyone totally fucks together in this one.
The difference, certainly, is Alicia.