Igniter/Signaller Aseemblies for Pipebombs

[Nnystyxx]

What exactly is the difference between a pipebomb and a beaker assembly?
I've noticed my black-powder beaker assembly didn't really pop like I'd expect.

afaik pipe bombs apply a spark/emit WAY WAY WAY more heat to their reagents when they go off and may use different scaling code altogether
whereas beaker assemblies are nefariously fucking difficult to get to behave when it comes to igniting reagents in my experience