The Glassy Tiger (Parantica aglea) looks very similar to the Dark Glassy Tiger (Parantica agleoides).
However, in Parantica aglea the dark stripes in the larger light areas are rather thin, while in Parantica agleoides the dark stripes are thicker.
In Parantica agleoides the other white spots are also smaller, making this species darker overall (hence the name Dark Glassy Tiger) than Parantica aglea.

1st, 2nd & 3rd photo: Cat Ba National Park, Cat Ba Island, Vietnam, 6 January 2024
3rd & 4th photo: Son Tra Nature Reserve, Da Nang, Vietnam, 31 December 2023