Difference between passing *mycar and &mycar

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I came across this in my book. Both of them look quite similar.

void fixFlatTire(Car *myCar);
void fixFlatTire(Car &myCar);

The first one pass myCar to function fixFlatTire via a pointer.
The second one pass myCar to function fixFlatTire via L-value of myCar. So, what's the different? Am I right, in explaining this way?