People generally make the mistake here of referring to LEDs by their bin codes when in fact the important matter is that the LEDs they are comparing are completely different.
The older Quarks, which are R2 bin, use the Cree XP-E LED. The new Quarks, which are (currently) R5 bin, use the Cree XP-G LED.
The reason for the different beam types is not the bin code but rather the type of LED (XP-E vs XP-G).
Naturally the XP-E will have better throw because it has a smaller die with the same size reflector as compared to the XP-G with the larger die and same size reflector.
If you really want throw you should be buying a light with a larger reflector, such as the Quark Turbo (since you seem to be interested in the Quarks), rather than worrying about small differences between the XP-E and XP-G.