What is the difference.(two cases)

0#1. You look twenty (years old). --01i00 the usual statement02i02br
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00#2. You look like twenty (years old). -- 01i00not natural02i02br
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00#1. What is the difference between A and B. -- 01i00there is one difference02i02br
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00#2. What is a difference between A and B. -

0I am not quite sure about this,02br
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00but doesn't 'You look like twenty' mean that someone is not twenty but look younger or older than his/her age?02br
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00For example, someone is in his/her forties, but look so young, so I might say 'You look like twenty!',02br
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00or should I say 'You look twenty'?0-

0To answerer.02br
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00I'm a questioner.02br
00I understood No.1 question.02br
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00As to No.2 question, I'd like to know about the difference of meaning or usage.0-

0I'm a questioner.02br
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00I make a mistake.02br
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00Please change No1 to No2 and No2 to No1.0-

0 01blockquote

01cite10Anonymous12cite10What is the strict difference between #1and #2.12br
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10#1. What is the difference between A and B.12br
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10#2. What is a difference between A and B.12br
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10As far as I know.02br
0

0 01blockquote

00#1. You look twenty (years old).12br
10#2. You look like twenty (years old).12blockquote

10As to these, I repeat that I see no difference except that #1 is the usual form and #2 is odd to me.0-