Friendly games do not really look like it would be something that could indicate how teams are going to play during the other times, I feel like we should just consider how things will turn out differently. I am not saying that we are going to see teams make a big difference or anything like that, I am just saying that we should not base how teams will do just from the friendly games at all.
I believe that France and England do have a proper chance to make it work, and I think they are going to end up with something that will change some things if given enough chance. These two teams just have way too much power and talent, it would be very unlikely for any other team to end up winning the cup, I do not see a third team even close to them.
Yes, the friendly event is just a test match that doesn't have a big target. Moreover, this match took place before the team's departure for Germany and I think all coaches will be very careful in fielding their full squad. So I would not be surprised at all if the friendly match produced a number of different results, meaning that the big teams were not able to achieve maximum results.
France and England are strong candidates, both teams have very complete squads. especially for the Three Lions, maybe this year's edition will be a big opportunity for them to make history as Euro winners. If we look at the players brought in by Southgate then it seems illegal for the team to return more crew in the four-yearly tournament