Thank you for taking your time to test the filters I’ve been working on/with.

The differences you are getting are due to camera sensor and lack of processing the images. I clearly state that one can get the effects SOOC (which means jpeg file). Also, you need to work on the RAW file. For the snowflake filter, do a WB on green folliage as a base line (same as with a 720nm). IR requires precise WB, skipping this step gives weird results.

The IR Chrome does not provide red vegetation in RAW files neither, the Lee stacks you tried are better suited for such a purpouse. Even my Autumnizer renders redder than IR Chrome in many situations.