The screenshots look like alpha to me.
There is no front rank kneeling, it appears - at the moment - only the first line can fire. The line infantry appear to be in large blocks not a thin red line, hollow square or marching column. It has the appearance that the firing line alternates similar to the arquebusiers in M2TW.
Soldiers uniforms are all differnt instead of the historical standard issue. Some wear white gaitors other black knee high boots.
No officers or standards atm.