Don't the tube type tend to introduce fuel as air flow increases? The tubes extend into the air stream slightly allowing the air flow to exert pull on the openings. Where as the straight does not.

www.cnc-motorsports.com/aed-5531-holley-accelerator-pump-squirters-tube-type-031-2-per-pk-29892.html

www.speed-talk.com/forum/viewtopic.php?t=54922

Master, again and still