If you only have a single node you'll never get any replicas (there's no added resilience or throughput benefits in allocating replica shards to the same node as the primary shard).
So I guess we can rule out any preference difference between Discover and Console.
It might be worth noting Kibana's description of timings. I wonder if there's added overhead in the unpacking of all that JSON in the 500 doc results (did we already establish performance was linear with the size setting for hits?)