Really, but the specifications stand to be much different....
P-800 Oniks has the following specifications
Length 8.9 m (29.2 ft)
Diameter 0.7 m (2.3 ft)
Warhead 300 kg (661.4 lb)
Engine Ramjet using kerosene liquid fuel
Wingspan 1.7 m (5.6 ft)
Operational
range 120 to 300 km (74.6 to 186.4 mi) depending on altitude
Flight altitude 5 meters or higher
Speed Mach 2.5
Guidance
system active-passive, radar seeker head
Launch
platform Fixed-wing aircraft, coastal installations, naval ships
Whereas Brahmos on the contary to it has the following Specifications
Length 8.4 m
Diameter 0.6 m
Warhead 200-300 kg conventional semi-armour-piercing and nuclear
Engine First stage: solid propellant booster
Second stage: liquid-fueled ramjet
Operational
range 300~500 km
Flight ceiling 15 km
Flight altitude sea-skimming, as low as 3-4 meters
Speed Mach 2.8 - 3.0
Guidance
system Mid-course guidance by INS
Terminal guidance by homing radar seeker
Augmentation by GPS/GLONASS
Accuracy 1 m
Launch
platform Ship, submarine, aircraft and land-based mobile launchers.
You were idiotic enough to not to comprehend my comment in the right way as it was just a general remark on all products not "BrahMos" particularly....