No. Mixtures are not all the same. Chemists sort them by whether their composition is uniform.
A heterogeneous mixture varies from point to point — oil-and-vinegar dressing, chocolate chip cookies, and granite are common examples. A homogeneous mixture (a solution) looks and is the same throughout, such as salt water, air, or a sports drink. Both kinds still contain two or more substances that can be present in varying amounts and separated by physical means.
Source: OpenStax Chemistry 2e §1.2 Phases and Classification of Matter