Bird vs Mailgun para e-mail transacional

import Mailgun from "mailgun.js";
import formData from "form-data";

const mg = new Mailgun(formData).client({
  username: "api",
  key: process.env.MAILGUN_API_KEY!,
});

await mg.messages.create("yourdomain.com", {
  from:    "onboarding@yourdomain.com",
  to:      ["customer@example.com"],
  subject: "Your March invoice",
  html:    "<p>Attached.</p>",
});

import { BirdClient } from "@messagebird/sdk";

const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });

const { data, error } = await bird.email
  .send({
    from:    { email: "onboarding@yourdomain.com", name: "Acme" },
    to:      ["customer@example.com"],
    subject: "Your March invoice",
    html:    "<p>Attached.</p>",
  })
  .safe();

if (error) console.error(error.message);
else console.log(data.id);