No interactions present.
Leaves are broader and look thinner in C.laurifolius.
Also C. laurifolius has only 3 sepals (but this is unclear in the photographs) and is not recorded from Sardinia.
C. laurifolius has smmooth thin leaves, not puckered (bullate?) and narrow. Buds of C. laurifolius tend to be somewhat resinous along with new foliage.
Lat/Lng: 40.8325, 9.6146