In order to get products data only, in your config.xml file of data migration tool, add below steps
<steps mode="data">
<step title="Data Integrity Step">
<integrity>Migration\Step\DataIntegrity\Integrity</integrity>
</step>
<step title="EAV Step">
<integrity>Migration\Step\Eav\Integrity</integrity>
<data>Migration\Step\Eav\Data</data>
<volume>Migration\Step\Eav\Volume</volume>
</step>
<step title="Map Step">
<integrity>Migration\Step\Map\Integrity</integrity>
<data>Migration\Step\Map\Data</data>
<volume>Migration\Step\Map\Volume</volume>
</step>
<step title="Url Rewrite Step">
<integrity>Migration\Step\UrlRewrite\Version11410to2000</integrity>
<data>Migration\Step\UrlRewrite\Version11410to2000</data>
<volume>Migration\Step\UrlRewrite\Version11410to2000</volume>
</step>
<step title="Log Step">
<integrity>Migration\Step\Log\Integrity</integrity>
<data>Migration\Step\Log\Data</data>
<volume>Migration\Step\Log\Volume</volume>
</step>
<step title="Ratings Step">
<integrity>Migration\Step\Ratings\Integrity</integrity>
<data>Migration\Step\Ratings\Data</data>
<volume>Migration\Step\Ratings\Volume</volume>
</step>
<step title="ConfigurablePrices step">
<integrity>Migration\Step\ConfigurablePrices\Integrity</integrity>
<data>Migration\Step\ConfigurablePrices\Data</data>
<volume>Migration\Step\ConfigurablePrices\Volume</volume>
</step>
<step title="Tier Price Step">
<integrity>Migration\Step\TierPrice\Integrity</integrity>
<data>Migration\Step\TierPrice\Data</data>
<volume>Migration\Step\TierPrice\Volume</volume>
</step>
<step title="VisualMerchandiser Step">
<integrity>Migration\Step\VisualMerchandiser\Integrity</integrity>
<data>Migration\Step\VisualMerchandiser\Data</data>
<volume>Migration\Step\VisualMerchandiser\Volume</volume>
</step>
<step title="PostProcessing Step">
<data>Migration\Step\PostProcessing\Data</data>
</step>
</steps>tep>
<step title="PostProcessing Step">
<data>Migration\Step\PostProcessing\Data</data>
</step>
</steps>
and run data migration command with reset. Hope it helps.