I think Rylan has what is called a 'Snap on Smile' on his teeth, as they are bigger & protrude more than his teeth did before. It is cheaper than getting your real teeth done as a mold is taken of your teeth & a one piece plastic veneer is 'snapped' on top of your existing teeth...
He keeps running his tongue across them, like a granny does with false teeth, which suggests they are not his natural teeth, also they are whiter than an eskimo's house
But as to the original question, can't stand either of them to be honest, which is a shame as I warmed to Rylan as a contestant on CBB after hating him on X Factor...