Unlike flip, the pressure solve in pyro is not distributed (ie. the containers were not treated as one by all the machines). In pyro, the containers are treated independently by each machine with overlap.
Until SESI implemented distributed pressure solve for the multigrid node used in pyro, distributed pyro will look different than a single container pyro.
You could also try replacing the multigrid pressure solve node in pyro with the variational pressure solve node used in flip to see if you could distribute the pressure solve. The variational pressure solve node used in flip is the only node can do distributed pressure solve in Houdini right now.