Search result to a model? + Json matching count.

Hello. I have two questions that I have doubts - before I make it:

1. if I have a search collection that is dug out from multiple tables, and that collection will be used in multiple views and some other purposes, should I leave it as a collection and toss it around, or should I make model for that search and have collection of that model?

2. Json field in table has single word, multiple values. Search goes well with "whereJsonContains" but, how can I get which of the result has most matches? Example:

searching for ["Apples", "Oranges", "Potatoes"]

1, ["Apples", "Strawberries", "Potatoes", "Mushrooms"]
2, ["Apples", "Mushrooms"]
3, ["Apples", "Oranges", "Potatoes", "Mushrooms", "Raspberries"]

Result should be 3 - 3 matches, 1 - 2 matches, 2 - 1 match (or 3 - 100%, 1 - 66%, 2 - 33%) whatever, but you get the idea.