This is the nature of the internet. People can say whatever they want with no source to back it up. There are no repercussions, they just sulk away and hide for a while or just change the argument in their favor or worse, go on the attack and start insulting people.
I posted pictures from the first trailer that showed the tractor to be a Deere. Some guys were convinced, others insisted it was another brand with no similar comparison picture to support their argument. Still others went back to the well of garbage false information that people grab a hold of just to have something to say. Not based on facts, but just repeating someone else's words. I was about 95% sure it was Deere and Tuesday wasnt much of a surprise but a confirmation on my opinion. But i was more happy to hear that Deere was truly coming to the game than I was about being right.
That said, the tractor from the first trailer was a 7R, this one clearly wasn't. Why did it change? Who knows. The 8400R is Deere's flagship standard frame tractor. They could be making changes to the 7R model numbers and tractor updates don't get announced until August.
Outside of Deere, there are A LOT of things in the trailer that I noticed, have shared and is getting no discussion whatsoever.