One obvious way to find out, play him there...if he shines all well and good, if he struggles, then he reverts to wingback.
We don't play with wing backs ... we play with full backs. The one on the left is world class, great going forward, creative, quick ... defensively sound.
Most importantly he supports his centre half , always in position ... knows how to defend, gets back in and works his f*cking socks off. Not much gets round him or round the back.
The one on the right doesn't.
Time to find one that does ... maybe ramsay and see what he's got and in turn see what trent has got. He needs to work harder ... he needs to be better.