It does look like that one was 2 heart pans together, but to be honest I would start with a sheet cake and 2 rounds and cut it down, that way you can shape it how you want. Cut one side off to desired curvaceousness, then use the cut-off piece as a template for the other side...or just eyeball it! HTH
Two heart cakes with the pointy ends cut off. Plus two cakes baked in dome shaped moulds.
Thanks Very much :)