Bronze golems

[CCamfield]

I went looking to see if anyone had come up with stats for bronze golems, and found two different writeups. Could anyone give me their opinion on whether either of these look unbalanced?

http://www.pmulcahy.com/misc_pages/monsters.html
(about 1/3rd of the way down)

http://heralds.milwood.net/rules/monsters/bronze_golem.htm

 

[Thresher]

Quite cool, I think the CR of the first one needs to be upped to 12 like the second one, I think it would whup level 10's pretty easy.