Hi Joao,

I think you probably need to establish if the those two urls came about due to a cms or system issue. I ask this because some cms system create duplicate/different  urls for the same page and the good ones have a canonical set up to avoid duplicate content.  If it is a system or cms issue then get a canonical set up. Use screeming frog to run a crawl to see if i picks up any duplicate urls. Currently, your homepage runs the risk of duplicate content penalty.

If its not a system wide issue, then set up a 301 redirect. Think of the home page that people will remember easily and can share on social media platforms without part of it being cut of due to length.

All the best

Duke

I think you are taking my comments out of context. I said "You need to look at it from the context of your overall links". This is about having a natural link profile. This can be variety of link sources, link quality profile, Moz rank variation of your link sources etc. If the 120 links you got from the great blog posts at SEOmoz only contributes to a small percentage of your total links then you should be alright. If it however contributes to +80% of all your links then that is a warning sign.

I think it generally depends on the cause of the duplicate. If its system issue then you'll forever be creating 301s for your urls. In that case its best to avoid having to do the 301 and stick with canonical. With canonical are telling the search engine to only index one version of the url.

Both 301 and canonical have their uses but the choice should depend on the issue and what you are trying to achieve. Hope this helps?

Duke

I would suggest you stay well clear of them. They are similar to those companies offering you cheap links. The long effect on your website will be painful. To be honest, I would question anyone who claims can automate link removal. The process of removing links is a long and painful process which requires human to do it. There are bits of the process that can be automated but the final decision on which links to remove can't.

Take a look at this Q&A for some useful steps http://www.seomoz.org/q/does-anyone-have-any-suggestions-on-removing-spammy-links

Other tools that might be useful are

http://www.outreachr.com/bulk-domain-checker/

http://net-peak.com/software/netpeak-checker/

http://tools.seogadget.co.uk/

All the best