Neither form will produce an absolute, nor immediate, result. Google has to consider that either form may be intentionally misused, for various reasons, when evaluating any claim made.
We've known, for a while, of the various options to report Blogger blogs which violate Blogger or Google Terms Of Service. The option to report abusive blogs (aka spam hosts) has been an option since 2009. In 2010, Google added the complementary ability to report copyright violations. Recently, we see that the latter form, now titled Google Help: Removing Content From Google, has been expanded to include a dozen different Google services. The existing Blogger Help: Reporting abuse continues to be available.
The "illegal content" list for Blogger, in the Google Help page, has been expanded, since 2011 - though some selections, in the list, offer only a disclaimer. Removing Content From Google seems to cover clear cut legal issues - while problems reported using Reporting abuse appear to involve the complainants personal perception.
Regardless of which form is submitted, we must note here that all problem reports may not produce immediate - or appropriate - response. Also, strict attention to detail is required - your reputation may be on the line, with your abuse reports.
The list of content removal categories, in "Removing Content From Google" - with "Blogger" selected, has been expanded somewhat, since we initially noted in 2011.
- I would like to report malware, phishing, disclosure of private data or similar issues
- I have found content that may violate my copyright
- I would like to file a counter notice to reinstate content that was removed due to an alleged copyright violation
- I have a court order declaring certain content unlawful (e.g., pursuant to a copyright or trademark infringement suit)
- I would like to report a product or service that circumvents copyright protection mechanisms
- I have found content that may be defamation/libel
- I would like to report the sale or promotion of counterfeit goods
In addition to the earlier reported DMCA Copyright Violations reporting options,and an option to serve a court order which relates to copyright / trademark infringement, we now see hacking (phishing / disclosure of private data), copyright protection circumvention, and sale of counterfeit goods, as removal reasons. And we see a continued disclaimer against removal of defamatory content.
As interesting as these new reporting categories are, we have to note that the "illegal activities" primarily include international electronic activity. Any illegal activities which relate to local or regional statutes, whether civil or criminal in nature, will still require hiring an attorney, and / or investigation and prosecution by local law enforcement officials.
Whenever you submit a legal claim to Blogger / Google, please remember that your claim will not be taken at face value - Google Legal will carefully consider everybody's rights. For best results, you may still need the advice of a lawyer - preferably one experienced in Internet related conflict.