That's not how this works.
Credit Karma buys the data for their free product from Equifax. So if lenders look at Equifax (and they do) then that's the exact same data.
You might wonder, "But if their product is free and they spend money buying the data for it, how can that make financial sense?" and that's the thing most consumers don't understand. What's better than selling advertising? Selling actual _customers_. Nobody (to a first approximation) is looking at credit scoring because they're bored, they are looking because they want to borrow money - they are potential customers for a lender. So you sign into Credit Karma and it says you're doing well, and they suggest you could get this MegaBank Gold Card. In fact, they've checked and you'll definitely qualify, no risk. You sign up, and MegaBank give Credit Karma a bunch of money for _finding them a new customer_.