Absolutely no difference. Those are two different conventions in printing a number in scientific notation. Specifically:
- the
E
can be either lower or upper case. The former is printed with format string%e
, the latter (which is less common), with format string%E
. - the
+
before exponent (and/or base) can be omitted.
Regarding the first point, maybe those two values are printed using different format strings, but without code, it is hard to tell.