Wow... can't believe this hasn't been done till now. Personally, I think we need to wait a little and see what Flash can do first. Eddie would be like chaos version Venom and Flash the more controlled and calculated counterpart. Flash's training trumps Eddies. I agree with some above posters in that Flash has more combat experience, weaponry (etc.).
The only thing Eddie has going for him is more experience with the symbiote. But Eddie's a maniac. He gives it and goes balls out. This strikes me as a berserk Wolverine versus a controlled martially focused Logan type fight ... (hey, could be a cool new thread idea!)
I give it the fighter most likely to think himself through to a win.
I don't want to scan-dump but there's also his taking on the equivalents of Spider-Man, Hawkeye, and Captain America at once and winning up until they received reinforcements in the form of two more super-villains.
There's more to the Carnage and Toxin fights as well but Eddie doesn't have that great a track record against Carnage, let alone someone the power of Toxin.
I'm 31 and trying my hardest to get out of the most boring state in america....Connecticut (no offense). I pretty much lived transformers as a kid and HATE the new movies and cried in the 80's one when prime "bit the dust". I am now the world's biggest Agent Venom fan. I love old skool anime (Ninja Scroll, Guyver, Fist of the North Star). I just went to my second Con event this past summer. If I was an X-Men i'd probably be Gambit since flirting comes natural to me lol. I work a dead end job at a really snobby restaurant that serves italian food and i'm also running two websites to make extra $$.