MSRP's about the same... what size you wear, REI has Pro-tec XL in stock for $40 on sale right now.
Or ebay has a size large for $44.
New Pro-tec Ski Snowboard IPS Safety/protective Gear-mens Hip Pads-large-$70 | eBay
Not trying to push you one way or the other. Actually, the pro-tec ones are pretty nice but I would've preferred a more solid pad especially on the tailbone like they used to do in the RED impact shorts. If the Nike stuff is hard like *actual* football pads that I used to wear in high school, then I'd go with those. If it's just a foam pad, then it's a toss-up and I'd say go with which ever you can get a better deal on.