Some questions about propagation

[sunyclj]

In paper, "To demonstrate the effects, we compare BasicVSR (using bidirectional propagation) with its unidirectional
variant (with comparable network complexity)."please, is the complexity of the network structure of the comparison experiment different here? for example, bidirectional propagation contains 30 resblocks ,unidirectional propagation contains 60 resblocks ? What is the network structure of this comparison experiment（unidirectional propagation）?