Spectra Cape Horn 330 vs. Newport 400

[rostyvyg]

I am just wondering how those systems differ. I am interested in compact versions of both that use double 20" membranes. It appears that CH is manual while Newport is automated, but this is not the question. Are Clark pumps used in both different or are they the same? If Clark pumps are the same what makes Newport a higher capacity unit? The older Newport I saw has the same 2 Sureflo primary pumps as CH. The current model seems to use a different pump arrangement. But, again, comparing Newport 400 with 2 Sureflo pumps and CH what attributes to Newport higher output? Thanks.