The 25 gauge hemmed edge channel is recommended for easier installation and increased resilience over the 20 gauge non-hemmed edge channel. All the sound tests for the Pliteq GenieClip are with 25 gauge channel.
The 20 gauge non-hemmed edge channel can be used and is approved for use by the manufacturer. The channel is less resilient though so it will be more difficult to install into the clips.
Other than that, you're set.
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