Well it depends on how one defines best. Closest or original, nicest bends, helpful service, blah blah.
My experience FWIW - and this goes back at least 5 years, maybe closer to 10.
Goal: Performance, overkill heat reduction and flow capacity.
Need: Replace the main chassis fuel line which had some rust and maybe even porosity over the axle, but no obvious leak.
Decision: Stainless 3/8 line in stock location (plus pick up and feed, of course).

Purchased in this order for a '67 Barracuda:
1. Fine Lines, claimed to fit 67-8 B & V. Bends were somewhat collapsed, so returned. See goals if this seems extreme.
2. Classic Tube, claimed to fit 67-8 B & V. Did not fit my '67 B'cuda correctly. Cut up tubing for other purposes.
3. Inline, claimed to fit 67 B. Fit well in original location.

Is there a difference between 67 and 68 or between Barracuda and Valiant? My guess is yes. Does that mean that the people at Inline know when there differences better than the other two? I have no idea. All I can say is that they did in this one instance.