Let us not bring skill into this. They actually play VERY DIFFERENTLY.
Maybe Vindictus EX and Dynasty Warriors play alot alike, but regardless, Vindictus actually required work to make. Dynasty Warriors online looks like the latest Dynasty Warriors, modded with Multi-player in. I am actually interested in it, but at the moment Vindictus seems to offer what this has, and more, so I'm going with it.
I'm not opposed to the idea, just saying from the videos it doesn't look like it'll be better than Vindictus.
Also, in Vindictus, the enemies attack you. No offense, but I've played pretty much all the Dynasty Warriors & Samurai Warriors, and it seems like that remains the same based upon that video. You could never loose to a normal enemy, they're also unaggressive. The "bosses" or generals, can also be just killed easily. There is almost no enemy variety either. Also, the mission objectives remain like the console games, looks kinda meh.
I mean, I will probably try this out, but it's Aeria games, they're actually pretty bad at running games, especially the cash shops. For another Aeria game I played, you could buy 5x XP, 5X Gold, and a bunch of stuff, from what I've been googling, the cash shop in this will be similiar, I don't like "paying to win".