Who takes the W if these were to face off?
Ricardo has been KOed twice... but never has lost by submission. He shouldn't be in danger to lose to Liddell by sub. Arona lost to Fedor by decision and Wanderlei by decision too. He's 28 with a record of 12-4 and loves BJJ.
Liddell has only lost by KO in his career and all of his losses were to great fighters like Rampage, Couture and Jeremy Horn. Liddell is 37 so he is much older with a record of 18-3.