I think the same too and I let him know a month ago when he delivered the panzer crew (3 crew) plus other vignettes that I think he's my best figure painter so far, even better than AI.
You're right, the positioning was very poor because some figures would not sit flat due to plow's handle hindrance. I should have found some boxes for them to sit on. But time was running out (the sun is setting) and I had many more pieces to take pictures of. Several pictures are not so clear this time due to low light and hastiness.
You've made a correct guess here. Yes, the tank and its commander is AI's old work. It's being used here as a background or backdrop - to highlight this figure set. They're tank riders after all. ;-)