OpenRA

I don't really mind this. It's good that the sides are different.

But why did the soviets get the lorry bombs, when in the original they were available to both sides?

Anti-stupidity measure to prevent an endless queue of nublets from trying to Chronoshift a load of Demo Trucks and taking themselves out in the process because they insta-detonate.

Serious answer:
No idea actually. As for this being different to RA95, so are many other things.