Thomas M. Kubik/TK Photography Jonathan Holtzman is a developer who seldom is wowed by what his competitors do. He can look across a Chicago skyline embellished by apartment towers of recent vintage and find a certain sameness. “Developers in Chicago seem to be obsessed with building concrete high-rises with floor-to-ceiling glass with small bathrooms,” he said. Holtzman also mentioned competitors’ small closets — “Chicago has four seasons,” said the Detroiter — and few nooks for a home office— “People have always worked from home.” Holtzman takes issue with apartment builders who flip their projects to an investor once the units are leased. The CEO of City Club MDA Apartments is a long-term owner of what he builds, with past projects including a Gold Coast building and renovations of the landmarks Randolph Tower and Fisher Building downtown. He believes his approach leads to a different product. His marketing pitch is an “apartment hotel” strategy, with higher-end amenities and finishes.