Here you see side by side two g-shocks: gw9200 (Riseman) and GW3000D (aviator series). They are syncing perfectly each night indoors, about 1500 km North from the German atomic transmitter:
I love atomic time keeping... - YouTube
If you have pictures or videos of different atomic watches side by side, please, post in this thread. It will be interesting to see.
Besides, syncing perfectly works for me in Italy, Lithuania, Croatia, but it seems that far South - in the Canary Islands the signal already was too weak and the watches did not sync.