W0gb or w5gb?

20gb at £9pm or 25gb at £9pm? What's the difference apart from 5gb extra?

Hi Waterloofrank welcome to the community and thanks for posting!
I'm not sure where you're seeing these two prices, but I think it might be related to number of UK texts/minutes or number of international minutes included.
If you're on the Lebara website deals page expand the 'show details' option next to each offer.