uchi or ie? whats the difference and which ones more common?
Is there a different use for these two words? thanks in advance :)

Question

Answer

いえ sounds more formal than うち. (うち is more colloquial.) 
いえ means "house" and うち has more meanings, "house", "my house" and "my" depending on the context. 
Examples:
Please come to my house. = わたしのいえにきてください / うちにきて(ください)。
my mother = わたしのおかあさん / うちのおかあさん
my friend's house = (わたしの)ともだちのいえ = (わたしの)ともだちのうち

I hope you get it.

Answer

From the way I had it explained to me the difference between uchi and ie is the difference of using house or home in English.  Uchi would be a warmer, more familiar and comfortable place were as ie is more formal and stiff.  
Hope this helps you.

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