I've play AFL and Rugby League, so from first hand experience, rugby league is a much more simpler game, and yeah its tough, but if you go hard then you've got nothing to worry about. Worst i've had is a head clash. Where as in AFL i've had my legs taken under me and landed on my head, lucky not to have broken my neck. I've also been slug tackle on numerous occasions.
Out of all this, you simply cannot call a sport tougher unless it has no contact, because injuries happen all the time. I question why you didnt flinch, maybe you didnt flinch because it was a low division? Because guaranteed if you tried div 1, youd have your ribs broken and head ripped off. May sound like im defending AFL (which im not) but people need to understand the difference first.