Both companies play dirty, but Samsung are dirty. I lived right by one of their research centres in Seoul. Here's a picture of how they recycle. (In case you can't tell, this comment is tongue-in-cheek. This is a bus stop.)
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The trash? That's how S. Korea does business in everything. I worked with a number of companies (although the software companies were different) and that is how every single one worked: they looked at contracts, and how to break them.
Samsung are the largest conglomerate in the world. Their mobile division is a pittance in comparison to everything - so is their electronics division. They will have no effect from this lawsuit and probably can freaking rend Apple a new one - in that Samsung work on a completely different legal plane than Apple.
As for design, just look at Samsung cars. They are direct copies of Nissan's. Ten years ago, they were direct Mercedes Benz cars.
And no one can stop them. Let's put it this way: Samsung account for 20% of S. Korea's export economy and since the 1950's have been given special dispensation from the government in S. Korea. They put politicians in place. S.K. annual paycheques are on average much less than USD 20 000$ for employees who have worked more than 5 years at full-time jobs.
Out of uni, they get about 6-7000$ USD. They pay heavily at the top and nothing at the bottom, and NO, it is NOT cheaper to live in S.K. compared to the states. It is MORE expensive.
How do they keep this up? Corporations like Samsung who have been allowed to grow so large that they own everything in the country. Hell, they are even allowed to sell illegal DVD/CD's openly at their supermarkets. The only people who get in trouble with the police are people who protest. That is the reason the cops even exist.
There is no way that Samsung will ever fall when the government of the country is owned by Samsung and Hyundai (who's former CEO now runs the country as President).
A lookalike lawsuit is something Samsung have undoubtedly had to deal with before and will deal with again. They are used to it and will get through it unscathed.
Apple, however, will tarnish their image in this lawsuit. Samsung, well, they have no image to ruin. They are the good foreign company to everyone in America and Europe. They are a cute manufacturer of TV's and phones.
There is no good guy in this suit. Apple are playing this IP stuff nastily and set a dangerous precedence for every company out there, big or small. But root for Samsung (even in this stupid lawsuit) and you're rooting for a corporate dictatorship, full stop.