Peace Maker / Peace Maker Kurogane (manga)

[The Jordan]

What's the difference between these two titles? Is one a sequel or something? I've got volumes 1 and 2 of Peace Maker but I've seen another series by the same authior and with the same characters called Peace Maker Kurogane.
Explain ploz?

 

[afrobutt]

Peacemaker Kurogane - Wikipedia, the free encyclopedia

I was under the assumption they were just two differant names for the same series

 

[The Jordan]

Naw, dude. I looked in the PMK volume 2 in the manga shop I go to and it was different to the PM2 I have so idk.
I checked on wiki a few days ago, doens't help much.