Are Doser 2 and original doser heads the same?

Hi, I have a four head original doser connected to my Profilux 3 for dosing Balling Light alk, I'm considering buying a two head Doser 2 slave to dose Fauna Marin Colours, are the heads from the original doser the same? Can I swap a spare head from my original doser to the Doser 2? Thanks, Andy

Hi,

I don't think because different SKU: PL-0587 for doser1 vs PL-1089 For Doser2 and Doser2 may have smaller roller for allow smaller dosing.
And now completely different head for doser 2.1: https://youtu.be/cNGoly8WKMk?t=86