Now with the Halloween upd is releasing i will compare both fruits on every criteria ..........I got both fruits mas 500+

PVP for bounty- lightning

Pvp but for fun - pain(the second life is good but got a small timer in my opinion u can gain a lot of experience using pain just be patient as it is hard to use)

Grinding - pain

Sea events - pain (lightning for only sea beast)

Raids - lightning

Graphics/vfx- pain (super saiyan)

Air fighting - pain (both are extremely bad but the pain c held gives it a edge as it is a pretty goodish snipe move)still try to fight on ground.

Grinding mastery on sword/gun - lightning (elemental reflex)

Dmg - pain

Stun - lightning

Aoe - lightning

Easier to use - lightning

More fun to use - pain (opinion)

Pvp mobility- lightning

Mobility for island to island - pain ( i tested both)

Makes u feel like a main character - pain

Makes u feel like a god - lightning

Overall:-

Lightning - use it if u are a pvp sweat, have difficulty hitting moves

Pain - use it if u are skilled and are patient want to use a cool fruit