After prototyping the risky computations, AMD discovered that the achieved throughput for the 32-tile solution is 24.2 Mpps, not the predicated 39 Mpps. Using the characterization data produced in the earlier step, you can predict how throughput changes as you scale up the design.
The total number of tiles needed to achieve 220 Mpps is ~275 tiles. Review the AMD Versal AI Core Series Product Selection Guide (XMP452). The VC1902 with -2M is a good choice because it contains the necessary number of tiles plus additional margin. The -2M speed grade gives a 1.25 GHz AI Engine clock. Refer to this link in the Versal AI Core Series Data Sheet: DC and AC Switching Characteristics (DS957).