I only see VMware vSphere with Operations Management? At any rate, they sound like the same thing note that you might want to check the latest blueprint for the exam you are studying for to ensure you focus on the features and products covered on the exam.
Go for VMware vSphere with Operations Management as these contains the binaries which are related to VCP exam and yes these will include the 60 days trail period
VMware vSphere with Operations Management includes vCenter Server, ESXi and other components which you can evaluate for 60 days. You can find other products evaluation - like a 30-day eval version of VMware Workstation - at https://www.vmware.com/try-vmware/
The reason I mention VMware Workstation is that it is possible to build a virtual vSphere lab - which allows to evaluate most of the features and prepare for the exam - based on VMware Workstation. Take a look at e.g. Building the Ultimate vSphere Lab for details.