clifford or offenhouser intake??

I got a question these two intake look almost identical to look at but there is some difference between the two which one would u recommend and why
Turbo Toad
I believe Clifford makes 2 different intakes for the chrysler 6 the one that is pictured in these posts and a copy of the (Ram Pak) from the mid 60's Nascar experiment. The Nascar exp has super long runners. This maybe causing confusion about volume and runner length.