EK Products Year of Publication?

[156925]

Half.com has all the EK books cheap but doesn't say which version it is, only the years of publication. Are these the years for the most recent printings:

MiniMcat - 2004
101 Verbal - 2002

1001 Bio - 2004
1001 Physics - 2003
1001 Chem - 2002
1001 Organic - 2001

If they aren't the most updated, are the close enough or are the significantly different and not worth it?

Thanks.

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