If it helps, the modern on the left is US ww2 sniper (appears to be marine/pacific).
The placement of his equipment screams it.
Here's an Empress ww2 US infantry fig to compare below
The one on the right I'm almost certain is German ww2 infantry with MP40 ( weapon and ammo pouch), rolled sleeves suggest fallschirmjager.
What scale are they? The german doesn't look derailed enough to be over 20mm.