First, in the UK Miata's are called MX-5s, hence me calling them '5s, just to clear it up.
Right, so that '5 would be around 300bhp in road trim, 350 in race. I've no idea about the power of the civic, lets call it 500bhp, it makes no odds.
On a proper racetrack, ie: for touring cars, not a high speed track for  F1/Indy/Muscle cars, I can almost guarantee the Miata will get round the track faster and the driver will have a bigger smile on his face than the guy in the civic.  The amount of grip these cars have is incomprehensible unless you ave driven one in anger.
Even on the road, the '5 is a silly amount more fun than ANY FWD car I have driven.
There is something about driving a RWD car designed to be an all out sportscar that is so better than driving a hatch with a big engine that was designed to drive your mother to her friend's house.
I DO know what I'm talking about, I DO race real cars.  My current
race car is a FWD Polo, 200bhp NA with suspension made to my spec, I
could go on....  So don't start telling me I can't drive or don' know
what I'm talking about.
Grow up, learn to drive a car round corners rather than planting it on a straight, accept that BHP is not equivalent to the size of your cock.