Ideogram 4.5 vs GPT Image 2.5: which version to use when

Ideogram 4.5 and GPT Image 2.5 both promise edits that hold across many rounds, but they split into two versions for different reasons. Ideogram divides by job. Ideogram 4.5 generates and edits, while Ideogram 4.5 Precise Edit changes one area and keeps the rest pixel-intact.