Yes, you are confused my friend..
Tom Brady - young
Antoine Smith - rejuvenated that year and healthy
Kevin Faulk
Larry Centers - still effective
Troy Brown - PRIME - Veteran experience
Deion Branch - PRIME and young
David Givens - Super clutch and tough
David Patten
Christian Fauria - smart TE
Daniel Graham - solid blocker
Damien Woody
Joe Andruzzi
Matt Light
Dan Koppen
Ty Law
Rodney Harrison
Richard Seymour
Tedy Bruschi
Mike Vrabel
Willie McGinest
Roosevelt Colvin
Matt Chatham
Tully Banta-Cain
Asante Samuel
Tyrone Poole
Ted Johnson
Roman Phifer
Ted Washington
Ty Warren
Jarvis Green
Bobby Hamilton
Is some of the best talent and depth you'll EVER see on one team I guarantee.
Still suggests that the '04 team was better, IMO. Swap out Washington for a rookie Wilfork, add Dillon to the mix, and Colvin actually played a significant role after missing almost all of 2003 with a hip injury. They had injuries at CB, but 2004 was when Samuel stepped it up and became a starter, plus Gay put in a really solid rookie performance (and Brown turned out to be capable on defense). Ty Warren became a full-time starter in '04 after spending most of 2003 as a role player, as well.
Not a knock on the '03 team, but the 2004 squad was on a different level. They were as close to unbeatable, down the stretch, as we're likely to ever see. Usually, when a team is even close to that good, it's because they've had an incredible run of health. The Pats had injuries all over the place, and they were still just too good to be derailed.
Re: 2007- Seymour played that entire season on one leg, they got very little out of their tight ends, Maroney was serviceable but nothing that anybody was afraid of (not even in Dillon's league), Colvin getting IRed was a huge hit to their pass rush, and Bruschi and Harrison were both shells of their former selves. They were probably still better on offense than '04, just because Moss and Welker were so good, but they were also easier to shut down, down the stretch. Lack of playmaking talent at RB made it so that, even if they were better than the '04 offense, it wasn't by a mile.
Conversely, the '04 defense was orders of magnitude better than 2007's. If the 2004 defense, which featured Seymour, Colvin, Warren, Bruschi, Harrison, McGinest and Vrabel all at/near their primes, had been given the opportunity to play with that offense, they would have absolutely gone 19-0, and probably would have won the SB by upwards of two touchdowns.