Hope the post is in the correct place.

Looking to pair down some of my cards and streamline but i have a few topps rookie that are rainbows and Photo Variations so wondering what the word is on which ones are a bit more rare as i realize neither is that scarce but thinking more longer term from my six year old son to help get him into card collecting more.

IS the Rainbow parallels of the topps update seriese rookies rarer than the regular photo variation versions and which ones do you think would come close to holding their values as much as possible in the future?

Thanks in advance for any help and assistance.

Will post the pictures of the Ohtani cards later on tonight as i know i know pictures or you dont have them haha