  In this Letter, we wish to point out that the distinguishing feature of
Magnetic Penrose process (MPP) is its super high efficiency exceeding $100\%$
(which was established in mid 1980s for discrete particle accretion) of
extraction of rotational energy of a rotating black hole electromagnetically
for a magnetic field of milli Gauss order. Another similar process, which is
also driven by electromagnetic field, is Blandford-Znajek mechanism (BZ), which
could be envisaged as high magnetic field limit MPP as it requires threshold
magnetic field of order $10^4$G. Recent simulation studies of fully
relativistic magnetohydrodynamic flows have borne out super high efficiency
signature of the process for high magnetic field regime; viz BZ. We would like
to make a clear prediction that similar simulation studies of MHD flows for low
magnetic field regime, where BZ would be inoperative, would also have super
efficiency.
