Similarities between Green Street and The Football Factory

Rating: 7/10 (26 August 2006)

Alright, I ought to first say this: I really enjoyed this movie, although there were some rather unbelievable and/or over-Hollywood-ed parts. For what it lacked in realism (e.g., Elijah Woods' character becoming an insider in a football firm -- highly bloody unlikely) Green Street's writer/director made up for the films shortcomings with classic Shakspearean theatricality (e.g. Bovver's betrayal/redemption and the entire climactic scene versus Milwall).
But there are some alarmingly close similarities between Green Street and The Football Factory that lead me to wonder how original Green Street, which was filmed later, really is.
Point 1 - In both films, the protagonist's firm fights -- and annihilates -- the Yid Army (the name of Tottenham's firm).
Point 2 - In both films, there is a trip to northern England for away games; in Green Street, the lads travel to Old Trafford to fight a Man U firm. In The Football Factory, the Chelsea firm goes to Liverpool.
Point 3 - In both films, there is a multi-split scene of the televised FA Cup draw. In both films, Millwall is the draw, and in both films there is exuberant celebration from the Millwall lads and the West Ham/Chelsea lads respectively.
Point 4 - In both films, the climactic ending involves a ruck with Millwall, and someone getting payback for an earlier wrong. In Green Street it is Tommy Hatcher going after Pete Denham; in The Football Factory, it's the entire Millwall crew going after Tommy Johnson.
Point 5 - All the above events occur in the same sequence in both films.
The biggest difference between the two (besides the accents being authentic in The Football Factory) is that we actually see a football (and a football match being attended as well!) in Green Street. The Football Factory is completely about violence.
I enjoyed both of these immensely. But I was curious whether or not anyone else who had seen both had noticed these items that I am comparing.