Aquamaxx protein skimmer difference

[SeeFu]

Hi all, i'm setting up a new tank and trying to figure out which protein skimmer is right for me. Can someone tell me what's the difference between these two skimmers

ConeS Q-2
https://www.marinedepot.com/AquaMaxx_ConeS_Q_2_In_Sump_Protein_Skimmer-UJ00157-FIPSIS-vi.html

ConeS CO-1
https://www.marinedepot.com/AquaMaxx_ConeS_CO_1_In_Sump_Protein_Skimmer-UJ00154-FIPSIS-vi.html

Thanks!

 

[Blue Ring Octopus]

The Q-2 is for a bigger tank, say a 120 gallon and up.
ConeS Co-1 is a very popular skimmer and it is for 75 gallon tank and less,