That’s a tricky question. As I’m sure you’re aware the amount of different hollowing tools available is staggering. Each with it’s own take on the task.
My personal choice are the Simon Hope carbide tools. It’s the only tool I use for hollowing now.
I used to have the Crown revolution, but sold it. Now I’m not saying it’s a bad tool, far from it. But It didn’t suit my style of turning.
I looked at as many tools as I could on YouTube and looked to see how they were designed to use, then chose the one that looked most suited to me.
Good luck with your choice.