Hello Simon,
the older PayPal payment options (Checkout and Standard) have a completely different setup and use older standards. This is why PayPal is pushing so hard to switch over to the newer version of the plugin. Our new version contains new features such as Vaulting, PayPal Card Processing and Pay Later.
The plugin has been built new from the ground up and is not really comparable with the older versions (even though the function is the same). It will be able to evolve with the market requirements without too many issues over the next year.
The PayPal Checkout plugin will remain available until around March next year. So if it works well for you and you are not interested in any of the new features the previous plugin should continue to work fine.
Regarding the “smart buttons”: the payment option buttons you are shown in the iFrame are called smart buttons. They are pushed into the iFrame by PayPal after PayPal get the details from the merchant, site and customer. This is also related to the new features described above. I believe you can get the debit or credit card as you showed in the links by deactivating the Card Processing in our plugin.
Let me know if this helps you further.
Kind regards,
Joost