Can't tell you which is 'best'. I would have to agree with others in that a '5/8'wave antenna is a '5/8'wave antenna, about the only 'big' difference is in the mechanical construction. Which is stronger, or lasts longer in the weather you expect it to 'live' in? I can't tell you that one either, too many variables involved. Compare them by weight? Heavier means stronger? Beats me, lots of variables in that too (packing?). Cost? Oooo, I ain't going there, especially the way the economy is now!
Good luck!
- 'Doc