Focus mask? Sam and I have been doing a lot of those. All SNF S4 splashscreens had serious focus pushing and pulling. 
With a mask, putting some blur on the background, sharpening the front guys, some color reworking and a few other tricks the infantry image can become quite good.
The tank image requires less work to become a good highlight, so in its current state it looks better.
If you do the work, i vote infantry, if you don't i vote tank =)