Jehovah's Witnesses. The steampunkers of the christian world. They try to live according to rules actually found in the New Testament, without the interpolations and traditions that grew up around it.
So whereas the catholics have to retcon 2000 years of contradiction into an enormous wobbly heap of handwaving, the JWs have only the first century of contradiction to worry about.
They don't believe in a spiritual afterlife, but that after the end of the world, you get a new perfect body on a new perfect earth forever - unless you were evil, in which case you just cease to exist. Because that's what Paul wrote, before Hades got imported from Hellenistic religions and conflated with Tartarus.
They don't accept blood transfusions, because Leviticus says we mustn't eat blood. Even though (1) transfusion isn't eating (2) they ignore pretty much everything else in Leviticus, and (3) blood transfusions are a jolly good idea.
Which only leaves the question: Surely you'd drink blood?
They don't celebrate Christmas, because it's the Roman Festival of Saturn, and therefore pagan. They don't celebrate Easter, because symbolic rabbits and eggs come from fertility cults, and are therefore pagan.
They don't perform the Eucharist, because eating metaphorical god-flesh and drinking (eating?) metaphorical god-blood is the festival of Dyonisus - god of grain and therefore what you make from grain. So it's pagan.
What they do instead is...once a year take a sip of wine (representing blood) and a bite of bread (representing flesh) to commemorate the death of Jesus.
So what's the difference? The difference is: They don't call it the Eucharist. So when they do it, it's not pagan.
They are also the nicest nutjobs I've ever met. I've chatted and debated with dozens of flavours of christian over the years, and the JWs are the only ones who've never threatened me, lied to me, or assumed I must be an idiot because I didn't agree with them.
Well, tonight they've invited me to their not-Eucharist. So I'm going, and coming up in Part 2, my impressions.