Stroller for two babies with one year difference

Hi everyone. We are expecting our first child this September. We are also planning to go for our second baby within one year of having the first one. What type of stroller should we buy so that it can be expanded when the second baby comes. I saw some options in Graco but not sure if it can support two babies (looks like its for one baby and one older sibling). Or should we just buy two separate strollers. Let me know your suggestions and choices on this.