SCP HTML5 vs JAVA application

Hi Gurus,

I've going through the SCP user manual but still confuse between these two.

May I know what's the difference between these two application in SCP?

In what scenario should we use for each application?

If we need an app to consume the data from S4 HANA and Hybris, what type of application should we use? And what if this app need to have integration with bank payment gateway whereby the user can make payment through the app, which type of app is prefered?

Can I call JAVA application deployed in SCP in HTML5 app itself?

I noticed we are only allowed to deploy certain number of JAVA application but there is no limitation for HTML5.

Thanks.

Regards,

-Ben-