Wich is a more aggressive wheel?

geosZ

Hey all I'm kind of a noob to this and I have done a quick search and did not get lucky. I have 2 questions.
1) Wich is a more agresive wheel? 18x9.75 +20 or 18x10 +25?
My guess is the 18x9.75 +20 but if it is, is it a big difference?
2) can I fit a 18x9.75 +20 in the front if I decide to go with a square set up?

Thank you in advance
George

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