Who was better... Shevchenko or Michu?

Bottom line is, why do some players come from abroad and land like a duck to water (the words, Luis & Suarez come to mind) and others come with a hefty price tag and forget how to even play the game?

We thought it was worth 15 minutes or so of ours & your time to discuss.

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Equally, title/relegation contenders... start of the season and now... has it changed?