What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

Phosphorous is a pentavalent element hence show +3 and +5 oxidation state (d orbital presence).it form two oxide P₂O₃ (+3) and P₂O₅ (+5). These oxide of phosphorus exist as dimer in form of P₄O₆ (+3) and P₄O₅

Common feature of P₄O₆ and P₄O₁₀ 

(1) Both oxides have closed cage like structure.

(2) Both oxides contain six (P-O-P) Bond.

(3) Both oxide have 4 six membered ring.

(4) Both are the anhydride of their respective acids.

(5) Both are Non planer