Tesla is pretty much better overall, and is story locked unlike Napoleon. If you have to pick one of those two, Tesla is the only one to pick.

@DeltaBladeX yeah ik, im just trying to find a way to choose between my wants and my needs so yeah. Tesla is overall the better one but I've always wanted Napoleon since he came out but I haven't got him yet.

Understandable. Been wanting some general pool servants since the start of me playing this, now getting close to 3 years, and still no Saber, Mordred, Orion, Bradamante, Sanzang, Jack, Jeanne d'Arc and even some SRs like Emiya, and missing others I don't want that much. Including Napoleon. :P

But between story lock and gen pool, I still ended up picking story lock for my account, with Medb who I'm meh on but offers 4 new quests once I get her levelled up, and could only get with purposely summoning for her, or wasting Quartz on the Story Summon banner.

Roll for the Napoleon banner on a few days and then take Tesla from the ticket.

Than it's only your choice. If you want him more enough to pick him over the better unit. In my case I guess like them equally, so I've voted for the Tesla. Also on the side note you kinda could try to go for Napoleon on his banner soon, but this kinda can damage your Oberon founds.