Only what is on website and asked how the 4x line would compare to the Vortex Razor HD LH and got this response.
This product will be available as of August. Product will be as good or better than the Razor HD, with GPOBright™ lens coating technology, PASSIONdrop™ hydrophobic lens coatings, aluminum turret caps and internal turrets that can be reset to zero, so the users can always know where their zero setting began. Total transmission will be more than 90% with GPOBright™ transmitting more than 99.7% of available light through each surface. Resolution will be excellent, size and weight will be competitive. Reticle will be the German 4 and turrets will have cm adjustments. It will be an excellent scope for low light situations."