Other than supporting the plant so adequate sunlight and air circulation can reach everywhere it needs to, no, it won't produce any larger or better tomatoes than any other type of tomato cage or support system.

IMPO, I don't think they even do a very good job of supporting, compared to other kinds of tomato supports. Supports - that is ALL these are, nothing more. Why would you think spirals might produce better toms?

I like tomato cages. The spirals tend to be too small and they only support the main stem. The main stems on my tomatoes rarely need support, but by the end of the season, the branches do, particularly when they are laden with tomatoes. I can always tie a branch onto the tomato cage, but with spirals, you'd be out of luck. The foldable square cages tend to be better than the hoop cages, because they are easier to put on after you remove your wall-o-water, if you are using wall-o-waters and because they are easier to store.

Larger, better tomatoes are a result of weather, water, soil fertility/fertilizer, variety and pruning. I don't prune, but careful pruning is supposed to produce fewer, bigger tomatoes.

I have a bunch of them - they're good as extra supports when the plants outgrow their cages, but unless you're growing small, determinate plants, or pruning your tomatoes heavily, they're not great as a primary support, IMPE.

I like these tomato ladders much better - also IMPE