Leopard 2s vs Abrams - What's the Difference?

There was an attack in the Verticommas by the Russians with a missile that went into Poland. An open source analyst looked at the imagery of the burning wreckage and it was like, OK, who has S 300? Well, the Russians are funny enough and it's in their defense. So do the Ukrainians. And very quickly from there, there was, OK, something might have gone wrong here. That is an immediate application of OSIN,. not just the strategic stuff, but then going back to the context, as you know, there's a raging debate going on about Leopard 2s versus Abrams. Why is there an argument? What is the difference?