Aristo makes 3 turnouts, a #6, a Wide Radius (matching a 10' diameter curve) and a Tight Radius (too tight, don't even think about it).
The WR turnout matches the 10' diameter curves exactly. The #6 is much gentler, and is a true numbered turnout, not a turnout that matches a curve.
There are no "standard" Aristo turnouts, i.e. that terminology is not used.
Use #6 wherever you can, but the WR will work fine for you. The broader/gentler the better, just like curved track.
Regards, Greg