With many things bigger is not always better but with VHF coax bigger usually is better. This is a visual comparison of Ancor Marine RG-213 and RG-58U. The signal loss for RG-213 at 100' is -2.7dB and for RG-58U it is -6.1 dB.
If you want a truly great VHF coax cable stay away from Ancor or the other "marine" coax cables and instead look towards Times Microwave LMR 400 Ultraflex or the Belden cables. The LMR 400 Ultraflex offers a -1.5 dB loss which is outstanding. Many of the hard core Ham radio guys swear by Times and Belden coax. I got my Ancor RG-213 for free, so I used it. Would it be my first choice now that I am aware of the LMR 400 Ultraflex? No, but if you get a good deal on any RG-8 or RG-213 you might as well use it.
I have learned a lot from my ham buddies but am sure I will be schooled after writing this. This article is written for the DIY boater who does not want to know more than they absolutely need to about coax or terminations. The die hard Ham's will debate for hours on solder vs. crimp terminations but I think, for boaters, I have found a solution that bridges the best of both worlds with a solder and a crimp. It is easy, and quick, and a lot more reliable than those Shakespeare quick connect terminals..