Great question — answering as the UphillTech team:
My own opinion is that they should be kept as seperate events as they are both different types of actions. What you could do is setup a single event goal, based on those two different event types. Say for example the GA category for your outbound link event is Outbound Link & then the GA Category for your contact link event is Contact. Create an Event goal configured as Category > Regular Expression > Outbound Link|Contact
Full answer by Bronwyn V: https://webmasters.stackexchange.com/a/132690 (CC BY-SA 4.0).
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