I'll be happy to break down Tekken for you.
IMO, the level of skill after playing BOTH against high level players... TEKKEN > DOA by FAR.
In Tekken's defense, it is not a dial a combo game at all. I would understand at the casual level. But if you're playing the game at the casual level you shouldn't even have to read any explanation or even make any comparisons.
In DoA, you can't break command throws. You can break regular throws. But the throw break is easy, just throw back. In Tekken there are specific throw breaks for each throw. All throw breaks are either a 1, 2, or 1+2 break.
In Tekken, frame advantage is REALLY important. Frame data is readily available by testing or by looking it up on TZ. Knowing what to punish with, how safe you are, what move will beat out which after a blocked attack etc. DoA does have frame data, but you don't really need frame data in DoA IMO because most punishers lead to a stun which the followup can be escaped. You're still stuck at the same mixup of poke/stun, throw/bait hi-counter throw. The only other option is to launch, and by doing so you pretty much give up on the potential damage via stuns/mixup stuns.
For DoA, you can't really compare it. There's no other fighting game like it. The stun system is pretty a guessing game between high, mid-p, mid-k, low. And the counter window may be smaller now but it's still huge considering the risk/reward.
As a 3D game, by far I'll say VF wins hands down. It has the most balance and is the hardest to learn system wise. Soul Calibur III is a piece of shit game. Now I don't only think this. The SC II World Champion hates the game and thinks it's boring. The US version of the game is so broken and boring to play at high level play. It's not even fun.
When it comes down to it, the fighting game community pretty much shits on DoA for it's lack of depth and it's scrub friendly system. I personally don't think it's a scrub game, but I do agree it lacks depth. It hasn't changed drastically over it's 5 iterations and the stuff they did add for the newest version(4) was borrowed from Tekken. If that wasn't enough, the community for DoA is pretty bad compared to other fighting games out there. It's pretty much an online only community. No one travels for the game they just rather play it online. While it may make money saleswise, it's not having the same lasting appeal that Capcom vs SNK 2, Tekken 5, MvC2, SF III: 3rd Strike, and other great fighting games out there. The games I just mentioned bring in 100+ ppl every year to a central location where ppl from all over the world battle it out in good old fighting game competitive fashion. DoA was given a chance to participate in EVO last year, what happened? There wasn't enough interest. There was interest in the DoA4 trailer that was premiered at EVO2005 though. It was boo'd at and laughed at when the Tecmo rep showed it off. That wasn't too cool.
The most experienced person with DoA4 before the game came out here(Bryan Dawson;writer of the official guide) noted that DoA is still DoA, and is not on the same learning curve or level of skill as Tekken.
But to each game's own respect. They're both very different, and can be VERY fun, in their own way. But if you really wanna know why Tekken is deep, I can go more in depth for you.
The thing I love about fighting games is breaking them down, by frame, by window, by execution. To learn whats possible and what's not possible. I actually have more fun learning from a game and watching than by playing it myself.
In the end. Apples and Oranges. Shouldn't compare fighting games. They're all too different. If anything compare from the same series.
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HOLY

DID YOU JUST SEE WHAT HAPPENED IN THE STEELERS VS COLTS GAME?
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