Spiderman (PS4) on PS5 (Free Upgrade)?

There's a remastered version of Spiderman on PS5. How is it when I play my normal Spiderman (PS4 version) on PS5. Will I then get a free upgrade to the remastered version or not?

Do you have to buy again or just play with the "old" graphics
https://www.gamepro.de/...62237.html

If you want to buy / play Spider Man Miles Morales, there's a 59 euro version where only the Miles Morales game is included and a 79 euro version where the Spider Man PS4 is also included as a remastered for PS5.

The new Spider Man Miles Morales can also be played on the PS4, regardless of which version, there's only one version for PS4 and PS5

I think Miles Morales is worth it if you were a fan of the first game, but you might be a little disappointed, the game is good, the story too, gameplay just like the predecessor, but it's a little shorter than the predecessor. The story is shorter and there are significantly fewer side quests.

Well, first of all thanks for the detailed answer. RTX is nice, but for the remastered version I have the new "Hackfresse" from Pete. It's a shame what Insomniac did to him. The old one was better.