Rat tailed is tubular in shape. Just like a rat tailed file. A strap leafed Vanda, which is over 90% of what we see, are the the wide "open V's" that we notIce on most Vandas.They are like and inch and a half wide.
The cultural difference between the two is that the rat tailed group takes even more light!. Many people outside of Florida and maybe south Texas can not flower them due to not enough light.
The Vanda leaves in these images above seem to be semi-terete which is a combination of the two types. It appears that these are mostly round with an open groove on the top surface.
