"signal-desktop-bin" is a binary based package. It's using Signals official APT packages and packages the provided prebuilt binaries.
"signal" on the other hand directly builts signal-desktop from source

Given the fast moving JS/Electron community and possibly breaking builds due to incompatibilities of signal-desktop's code with the latest arch build dependencies, I suggest keeping the -bin package for an easy to use, quick installing alternative to the source build.
The `-bin` suffix is widely used in AUR so I suppose most users do understand the implications.

PS: There used to be a third signal package in AUR - "signal-desktop" - it was recently deleted. It also was building from source so more a duplicate of "signal" rather then "signal-desktop-bin.

Thanks for your understanding,
I hope this package can be preserved.

Best regards,

On 27 February 2018 at 11:47, <notify@aur.archlinux.org> wrote:
buzo [1] filed a deletion request for signal-desktop-bin [2]:

There is another AUR package called signal with the same content.
Either this package or the other one could be deleted.

[1] https://aur.archlinux.org/account/buzo/
[2] https://aur.archlinux.org/pkgbase/signal-desktop-bin/