Better dealing with neither in that case - which is the what the EU is doing.
This is why the EU has made a defense and technology partnerships with India (Arunachal) [0], Vietnam (Hoang Sa) [1], Japan (Senkaku) [2], and South Korea (Yellow Sea) [3] and is indirectly supporting Taiwan [4].
Interesting how you also ignore the fact that the PRC has attempted to personally harm EU nationals in the past 2 years through physical and legal intimidation.