I'm hoping this isn't what I'd call Google's Microsoft stage - being focused on an area that a relative upstart dominates, with little results.
Internet Explorer was 'successful', but mainly as a block to prevent anyone else from being dominant in the browser space. What comes to mind is Microsoft's attempt to replace Google by imitating them thoroughly with Live search and then Bing, that coming after other projects such as MSN, an equally lame clone of AOL.
There does seem to be a big cultural difference between Google and Microsoft in that Microsoft was always focused on winning while Google's is focused on innovating. It seems baked into their corporate DNA. I know many Google+ engineers that will bristle if you suggest that it's just a Facebook clone. It's a necessary evil that it looks a lot like Facebook now, because there's a certain baseline set of functionality that users need in a social network and you can't just ignore it to be different. I'd be very disappointed, and I think many other Googlers would too, if Google+ was only just as good as the incumbent.
Of course, a lot will depends on what comes down from the top - the reason IE is lame is because it was destaffed after Microsoft won the browser wars. From what I know about Larry Page's personality, though, this doesn't seem like something he's likely to do.
Personally, I don't see Google+ as an FB clone either. Awarding FB the 'rights' to social networking features is reminiscent of a non-deserved software patent - the functionality of FB is not unprecedented, non-obvious or original. Their success is in bringing it all together in one place successfully. Talking to friends and sharing materials with them is a natural way that people are going to use the internet.
When I heard about G+ my thoughts were along the same lines as the recent posts from MySpace's founder. Google has offered these services for years, but they have not been well integrated with each other or presented as a unified product. Overall Picasa, Buzz, Profiles and so on have not been branded or marketed well. Putting these together makes sense. I'm glad Google has done it and I'm pleased to see it's being well received.
What seems new for Google is how this is a 'real identity' network. There's a key difference between communities where one can choose between a real name, anonymity or a pseudonym, exemplified by sites likes on YouTube, Reddit or your average random web forum, vs. the Facebook style where policy requires that you use your given name and have a single identity. Each style engenders a different dynamic, and has benefits or drawbacks. Maintaining the right to and acceptance anonymity on the internet is a quite important cultural issue in my opinion, however.
I definitely agree that Google and MS are very different companies, personality wise. MS's style is to copy competitors products, cargo-cult style, but miss the overall point. They seekt want to eliminate competition without really caring about the original point of the product - IE was just one in a long line of examples of this. They definitely don't care about improving the product after they eliminate the original, I suppose because the product or what it did was never the point. I don't think Google is like that at all... A company's behavior so often reflects the behavior of the people who run it at a high level, and the two founders of Google are not at all like Gates or Ballmer.
Internet Explorer was 'successful', but mainly as a block to prevent anyone else from being dominant in the browser space. What comes to mind is Microsoft's attempt to replace Google by imitating them thoroughly with Live search and then Bing, that coming after other projects such as MSN, an equally lame clone of AOL.