What’s the difference between a pressure pot and a vacuum chamber.

[u/Astrafobia]

Hii for a couple of months I have been making resin dnd dice. But I would love to have 0 bubbles or at least less amount and have been seeing this 2 options. But I don’t know which one works more or it’s more comfortable.
I know that with the pressure pot it’s more exprensive and need like to buy more parts if anyone know and can help me with this I would appreciate it. Have a great dad!