Networks in the future will be composed of a large number of devices with heterogeneous resources, various kinds of communication schemes, and different mobility capabilities. In order to achieve maximal efficiency under various constraints, it is critical to determine how devices should connect to each other, through wired or wireless links. The impact and the design of mixed wireline and wireless networks thus require thorough investigation. In this paper, link load, efficiency, and energy consumption of this kind of heterogeneous networks are studied through the simulation of network topologies using different spatial node distribution models, including uniform distribution, Poisson point process, and Matern cluster process. How the spatial node distribution affects the performance of the mixed wireless and wireline networks is discussed.