Re: All else being equal...
You're somewhat behind the times. In the UK men get 2 weeks paid paternity leave and both parents can then split the 12 months parental leave between them however they wish.
So it is entirely equal these days.
Source: I'm about to take 6 weeks parental leave with my son when the missus goes back to work. And I already had 2 weeks paternity leave when he was born.