Amazing pass – access

Hello – I have a question about the Osaka Amazing Pass. Am I correct in understanding that this pass does not offer the classic skip-the-line principle, but rather that it simply saves you from having to buy a ticket on site and potentially wait in a buying-line?

If someone has bought a ticket on site in the traditional way, is the entrance the same for everyone and could there be a queue if it is busy on that day before you can enter the attraction?

Best regards

by AiiiAi99