Recent research on electric vehicle wireless charging has shifted from static to dynamic charging. The focus when considering design options for the primary of a dynamic charging system is to transfer power smoothly and yet also be interoperable with all the various secondary topologies being considered. This paper uses a published double-D pad primary as a benchmark, and conducts a comparative study between it and limited length track based options which have been proposed in the literature. Of particular interest in the paper is the performance of single-phase and two-phase meander track primary systems to evaluate the potential solutions that may help minimize the number of power supplies per meter. This performance evaluation is undertaken here using magnetic simulations using a bipolar pad secondary which can be configured to act as either a traditional rectangular or double-D secondary, or as a multi-coil secondary. It is shown that under the same primary VA per meter the three primary topologies can deliver similar magnitude of power. Track topologies can offer larger charging zone and better interoperability while lumped DD topology emits lower magnetic leakage. Furthermore, a two-phase system can lower the requirement on rating of the electronic components on the secondary side.