[QUESTION] What's the difference between sig_on inside try: block versus sig_on_no_except?

[user202729]

Looking at the documentation, the following two appears to be functionally the same:

data = malloc(...)
try:
	sig_on()
except KeyboardInterrupt:
	free(data)
	raise

compute(data)
sig_off()

and

data = malloc(...)
if not sig_on_no_except():
	free(data)
	cython_check_exception()

compute(data)
sig_off()

Is there any difference? If not, then what's the advantage of sig_on_no_except()?