readability - Hyphens or en dashes—which are more readable when used in number ranges (for North American web users)?

Is there evidence to show that number ranges are more readable using hyphens or en dashes (on digital screens for North American web users)?

Wikipedia notes that, according to your style choice, you can correctly list store hours two ways:

Hyphen: 10am-9pm

Dash: 10am–9pm

Since neither is eliminated as "incorrect," which style has evidence to support that it is more readable (and more readily understandable)?

(As Wikipedia notes that "both are equally "'correct,'" I'm looking strictly for evidence to support one style over the other from a usability/experience perspective.)