Levo S-Works has 25% more power than a Vala so an extra Kilo won’t make a significant difference.More likely 1,5kg , top Vala has 21,47 kg vs S works 23,68, S works has 34,9 electric seat post instead of 31,6 cable in Vala, thats 200g, S works has 1300g front tire instead of 1150g trail casing in Vala thats another 150g, the rest is battery...just try to think a little bit more
/genie shock with piggyback is also heavier than classic Float X