If you loved Mobile Suit Gundam: Char's Counterattack, try Mobile Suit Zeta Gundam - A New Translation I: Heirs to the Stars
A bridge between a film you've already seen and one most people haven't. Mobile Suit Zeta Gundam - A New Translation I: Heirs to the Stars has roughly 3.1× fewer votes than Mobile Suit Gundam: Char's Counterattack — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Mobile Suit Gundam: Char's Counterattack

Mobile Suit Zeta Gundam - A New Translation I: Heirs to the Stars
What they share
Both films are directed by Yoshiyuki Tomino, and they both carry the epic mood tag, and they sit in Action / Animation / Science Fiction territory. If that's the register that drew you to Mobile Suit Gundam: Char's Counterattack, the second film will land in a comparable space — through a different lens.
What Mobile Suit Zeta Gundam - A New Translation I: Heirs to the Stars is
You jack a sleek combat mobile for a joyride and the whole solar colony locks down around you. But the resistance needs pilots more than rebels need thrills. A warlord rises through gas attacks while ghost pilots drift between factions. This remake sharpens every beam.