I would suggest to watch each video on youtube explaining the uses of these rulers. Jaybird sidekick makes diamonds as where lazy angle doesn't....Jaybird has a pattern she created to use the lazy angle ruler it's called Carnival, which I have both the pattern and lazy angle ruler. As of now, Jaybird has the Hex-in-more ruler, sidekick ruler, super sidekick ruler and the mini hex-in-more ruler...Although you don't need her rulers to make any of her patterns as she has template diagrams in her patterns, but me being me, I prefer to have the rulers...don't think I could have done Ballerina quilt without the hex-n-more ruler....but that's just me......with the lazy angle ruler there is only one certain diagonal cut in different sizes and the sidekick ruler cuts 3 different shapes in 4 different sizes....
Here is the lazy angle video
https://youtu.be/ERHFiL-Anfs
Sidekick ruler video
https://youtu.be/nFLcI0mAIB4
Jaybird has videos on all her rulers....