What is different between ladybug,honeybee & Diva in radiation calculation?

hi all
What is different between ladybug,honeybee & Diva in radiation calculation? which one is more accuracy please?

Hi,@ahad
I have tested the ladybug and honeybee radiation calculation for tree canopy. The result showed the difference of two method is very similar(adout 2%).
Here is the link:
http://hydrashare.github.io/hydra/viewer?owner=ymg2007&fork=hydra&id=Modeling_Tree_In_Radiation_Analysis__Using_Two_Methods

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