The two-layer color negative film sandwich is too strong of a filter for the IR modified Canon S300. It produces a virtually monochrome image, as seen below.
What I like and want is a duo-tone response, with red coming from a little visible red and the nearest of the near-IR, and blue coming from deeper in the IR--at least 800 to 900nm. Vegetation renders pastel blue and the sky and deep red. Most neutral items are a touch reddish, but not too much. Most black fabrics are pastel blue.
I can get it by removing one layer of the sandwich.
I believe the difference is greater when the sun is out and/or when tungsten illumination is being used.
P.S. For kicks here is the latter image with a boosted green channel, extra saturation and contrast: Cloudy Bartlett Quad, IR