Question about array declaration

What's the difference between

(A)	double * x = new double [10];

and

(B)	double x[10];

?

I ask because I'm modifying some C++ code someone else wrote, and they 
tend to use (A), but I've found (B) works just as well (and is a little 
clearer imo).  But I suspect there there must to difference, otherwise 
why have both.

Also, can

	delete [] x;

be use to free up memory created with (B)?

Thanks for any explanations.  -Pat