Not just different, it specifically a lower tax rate assuming that the stockholder has held long enough to use the long term capital gains tax rate (which lower than the dividend tax rate).

But this is not circular. Circular would be if I sell you an apple worth $0.25 for $2.00, and then you sell it back to me for $2.00, or other similar amount, and I get to mark all the apples in my inventory at $2.00 and show a huge profit (on paper). One can create variations of this blatant deal. Like I sell you some rubber for 10 times the market price, you make a balloon and then I buy the balloon for 10 times the market price. I may not have other balloons in my inventory, but plenty of rubber, and I show some nice profit. One can imagine other, fancier deals.

But in the case of AMD and NVidia, and OpenAI and Oracle, the direction is clear. OpenAI has a clear need for compute. They can buy it directly from NVidia and AMD, or indirectly from Oracle. They can buy it with hard cash (of which they don't have that much), or with their own equity, or some form of deal that offers the seller an upside in OpenAI's equity.

But there is not back and forth buying of the same item, or of rubber/balloons. All the deals seem legit. Is it possible that all the future compute will not be needed, because the AI craze will fizzle. It is, lots of things are possible. But that's general business risk.