Juyongguan vs Mutianyu

I'm taking my parents (65 & 70 yo) to Juyongguan on 14 March 2015 on a booked tour. I'm not sure if I have made the right choice. My 1st choice was mutianyu. It's my dad's wish to visit the Great Wall. Will it be as interesting n beautiful like mutianyu? Is Juyongguan popular with tourists? Thank you.