SO4 since we don't know when WKC will hit other regions out of japan.

I own WKC and it is very good. The western world will lap it up with it's active battle system, massive maps and amazing vizuals. My money is on it. Jrpgs have already proven to be average sellers, (at best) on the 360.

Also, SO only just made a million on the best Jrpg system yet, the PS2 and with it's huge user base, too! So, u all think it will sell the same units on the 360? LOL...

 I'm going to say May. They finished the game in at least November and WKC should have been being worked on for translation immediatly after that.

SO4, will be the first i think, and will be another quality title for xbox 360 owner

My prediction was 310k LTD. Do you really think that 10% differense matters that much or are you going to brag about every single copy sold over 310.000? I can do the same using your prediction. So please save your fanboyish comments to someone else.

I honestly don't think either will sell 1 million.

I think it's possible for Star Ocean to do it. There was a previous Star Ocean game for PS2 which sold over a million, so theres at least a million people who have played the series. Also I think people who Like Eternal Sonata/Tales/Blue Dragon may very well be attracted to this game if they haven't delved into the series already.

SO4.

It's an established franchise. It's published by S-E. It's on the 360 which has a larger install base than the PS3.

I'm sure WKC will do fine, but right now SO4 is in a better position to sell more copies. I predict WKC to sell around 600K-700K WW and SO4 to sell around 800K-1 million copies.

none will the first and maybe only one will be dragon quest X, final fantasy 13 and versus.
and likely do it in the first week.

TLR has only sold 300K so far in NA and Europe combined.  I highly doubt it will reach 600K.