Comapring Date in share point 2010 - problems using less than or greater than

Sharepoint 2010, using Sharepoint Designer 2010. I am a admitted newbie to manual coding.

I inserted a empty Data View Web Part ( DVWP ) and linked it to a list. I displayed the title as the only column. I then added a "when" statement to compare the @Modified date to the @Created date. Based on the results I would add text after the title. The intent is to display "New" in a column if a entry in the list was created less than 7 days ago (as opposed to the OOTB 2 days), or display "update" of it was modifiedin the last 7 days. currently I am using just one When statement for testing.

This worked in 2007. I did some modfications in 2010, necessary to format the dates correctly, but even using the exact working I had in SP2007, I get the same behavior. Interestingly enough, all DVWP's migrated from SP2007 with this code still work.

Issue: If I use Equal ( "=" ) or not equal ("!=") operators, it works as expected. If I use any type of less than or greater than operator'' it does not work. Examples: ">", "<"  , ">=", and  "<=". No error is thrown, it just displays nothing. Below is the code I am using.

On the line following

<xsl:param name="dvt_apos">&apos;</xsl:param>

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I inserted

<xsl:param name="Today" />

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This automatically generated

<ParameterBinding Name="Today" Location="CAMLVariable" DefaultValue="CurrentDate"/>

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in the DVWP

snippet of the code I used for the WHEN statement

<ul><li><a href="{@FileRef}"><xsl:value-of select="@Title" /></a>
	<xsl:choose>
		<xsl:when test="translate(substring-before(@Modified,' '),'-','') &lt; translate(substring-before(@Created,' '),'-','')">
			<span class="Ms-NewIcon"><xsl:text> !New</xsl:text></span>
		</xsl:when>
				
	</xsl:choose>
</li></ul></td></tr>

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