This diamond anvil design is essentially an optimised Drukker cut anvil where the height/base ratio has been maximised (for a particular size of diamond). The smaller the height/base ratio is, the lower the maximum load the anvil will sustain.
Drukker (standard) design diamond anvils have been shown (c.f. M. Seal, High Temperatures-High Pressures, vol 16, pg. 573 ) to have optimum strength.
All type IIas anvils are Raman ultra-low fluorescence and ultra-low birefringence, (100)-oriented and particularly suitable for IR and highly demanding Raman spectroscopy.