The logo and art (and maybe the colours behind the bubble) are basically original (25th/MEs were slightly modernized e.g logo is squished down and art is re-painted, at least sometimes). Hard to tell without doing a direct comparison.
Although the huge bubbles are weird, the figures don't always match the art (e.g. Retaliation(?) Snake Eyes in 1982 packaging), and the text is truncated or missing due to the very multi-lingual packaging, I find these feel a bit more retro to me than the 25th/ME releases. I love both regardless