Booting to windows with windows boot manager or bootmgfw.efi

Yesterday I have managed to successfully install and configure Ubuntu 18.04 LTS as a second operating system on my PC.Everything works fine,however there is one thing that confuses me:
In the GRUB,among all other boot options I have:

1. Windows UEFI bootmgfw.efi.
2. Windows Boot Manager (on /dev/...)

Essentially both of them successfully boot Windows 10,so my questions are: Are there any differences between this two options in terms of operations or functionality of Windows 10? What are the differences between these options?

1 Answer

This explains the difference quite clearly. If both work, there should be no difference between booting with the .efi file vs. using bootmgr from a user's perspective.