Which tool to use depends on what you are trying to do. If, for example you want a low drag airfoil for a speed model you would be well advised to look at the coordinates of the wind tunnel test model of the S6063 rather than the true S6063 airfoil.

One thing that wind tunnel data is best at is showing the stall and post stall recovery behavior of airfoils.

If you are trying to select an airfoil for a particular application, Profili or X-foil will give you consistent comparisons that may not be perfecty accurate but the inaccuracies tend to cancel out making them excelent tools for comparisons.

If you are not prepared to strive for airfoil contour accuracy during the design and building process then you probably shouldn't be bothered with any of the above mentioned tools. The spanwise flow of very low aspect ratio wings tends to render the tools mentioned above of little value for that application.

For aerobatic aircraft applications, stall and stall recovery characteristics may be way more important than the drag characteristics.

For load carrying competitions, lift characteristics may be dominant. For sailplanes and long range aircraft L/D is the dominant priority.

Which tool, if any, depends on the priorities of the particular application.