It's all about the texture
『Eating cheesecake is a very sensual experience; texture is everything. Some recipes contain a small amount of starch, such as flour or cornstarch. These recipes will result in a cheesecake whose texture is slightly more firm and cakelike. These flour-containing cheesecakes can be baked directly on the oven rack at moderate temperatures. Cheesecake recipes that do not contain flour are intended to be delightfully smooth and silky. To achieve the proper texture, these cheesecakes must be baked in a water bath at a lower temperature. 』