WHAT CAM RUNS BEST FOR THE STREETS?

DO A HYDRAULIC ROLLER RUN THE BEST OR THE SOLID AND PERHAPS THE PROVEN SOLID/HYDRAULIC FLAT TAPPETS?

Obtw, I get numerous requests for technical advice and if interested, tex me @ 626 203 2712. Half hour to 1 hour+ rates are available.  Most calls go over as posted and it is ok.  US Pacific time zone.