Fuji Excursion Ticket Options: What’s the Difference?

Hi, I'm trying to check how to book train tickets for the Fuji Excursion via the official website. I'm not sure what the difference is between the 2 options and the info panel is of no help. Unfortunately, I can't add a photo, but the options I see are:

– Reserved Seat 8260JPY/adult

– Reserved Seat – Reserved Seat (E-Ticket) 3240JPY/adult

Are either one of these options the full fare already, or is there a separate ticket that I need to purchase?

Added info: we won't have a JR Pass and unlikely to use a transit card like Suica (should I consider this?).

Appreciate any assistance!

by FieldOfJars