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Question: W595 vs G705

please help me choosing between W595 & G705 . does the sound quality differs a lot? the problem is that I Prefer having GPS & Wi-Fi & a bigger screen (with a little money :D) but the W595 is more beautiful , has better sound and is cheaper .
and another question: I heared the G705 has a problem with its plastic surface like remaining the finger effects on it etc.