Are the 1-watt LED bullet light/1-watt Waterfall light, and the Pond & Landscape LED Light Kit replacement diodes interchangeable?

*This article is in reference to the 2013 and earlier generation LED lighting with replaceable diodes*

The 1-watt LED bullet light and 1-watt waterfall light share the same replacement diode.  The Pond & Landscape Light Kit has its own replaceable diode.  They cannot be interchanged.