.xml association file for two versions of office

Hi.

We have a bunch of PCs with Office 2019 and an other bunch with 2016. 

I was wondering whether there's a way to specify both in a file association .xml file through the File Exporer set default associations GPO template so that depending on which of the two is present it will assign that version to the mailto protocol.

Does anyone know if this would work if I add two lines to the .xml mentioning both versions? Will it just assign it to whichever of the two is present?

Thanks.