How to implement attribute specific templates without redundancy - xslt

Question

I'm familiar with using templates that key off attributes as follows (e.g. key off of the presence of foo):
<xsl:template match="something[#foo]">
<xsl:template match="something[not(#foo)]">
However, if much of the content of these templates is the same, is there a better way that still uses templates, since the community appears to prefer them? Or is the solution to just use xsl:choose. It's clearly preferable not to write duplicate code that must be maintained in both templates.
EDIT:
Here's my specific set of templates:
<xsl:template match="item[not(#format)]">
<td class="{current()/../#name}_col status_all_col">
<xsl:value-of select="current()"/>
<xsl:value-of select="#units"/>
</td>
</xsl:template>
<xsl:template match="item[#format]">
<td class="{current()/../#name}_col status_all_col">
<xsl:value-of select="format-number(current(), #format)"/>
<xsl:value-of select="#units"/>
</td>
</xsl:template>
and here's what I currently have using choose:
<xsl:template match="item">
<td class="{current()/../#name}_col status_all_col">
<xsl:choose>
<xsl:when test="#format">
<xsl:value-of select="format-number(current(), #format)"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="current()"/>
</xsl:otherwise>
</xsl:choose>
<xsl:value-of select="#units"/>
</td>
</xsl:template>

Answer 1

I would definitely use xsl:choose in this situation.
Just to demonstrate how you could use templates without code repetition:
<xsl:template match="item">
<td class="{../#name}_col status_all_col">
<xsl:apply-templates select="." mode="format"/>
<xsl:value-of select="#units"/>
</td>
</xsl:template>
<xsl:template match="item[not(#format)]" mode="format">
<xsl:value-of select="."/>
</xsl:template>
<xsl:template match="item[#format]" mode="format">
<xsl:value-of select="format-number(., #format)"/>
</xsl:template>
But I fail to see what advantage this would have. On the contrary, it suffers from the GOTO syndrome.
BTW, this may not be the best example, since I believe that supplying an empty string as the second argument of the format-number() function will result in the number being returned as-is.
So you could just use a single template to match all:
<xsl:template match="item">
<td class="{../#name}_col status_all_col">
<xsl:value-of select="format-number(current(), #format)"/>
<xsl:value-of select="#units"/>
</td>
</xsl:template>