Didn't see this before the Sunday games, but hopefully it didn't cost you a win. I have them both in a 14 team league as well (drafted Wilson as my starter and grabbed Wentz as backup, what a nice surprise!). It depends on your scoring, Wilson seems to have the higher ceiling, but Wentz has a slightly higher floor. FWIW, here's my plan the rest of the way.
Wentz - @Rams, @Giants, Raiders, Cowboys
Wilson - @Jags, Rams, @Cowboys, Cardinals
Serious consideration to just using Wentz in that Raiders matchup as well.