Iit comes down to flex and comfort. Personally I prefer il moro's
The biggest difference is in the cuff. The Il moro's cuff flex is noticably smoother than the cuff on krypton pros. On the pros it flexes great for a while and then it just stops abruptly when the buckles have been flexed out. You don't notice this until you've had a pro on one foot and a moro on the other. I switched to the il moro cuff and I'm really glad I did. I love the smoother flex and its been easier on my shins.
Although the cuff of il moro's is noticeably smoother, the pros cuff is stiffer and provides a little better response when it comes to charging. Also the il moro cuff allows the boot to flex more. So even though il moro's and pros have the same shell. The shell on il moro's will flex more than the shell on pros making it feel softer. Personally I enjoy a softer flexing boot. Il moro's are soft to medium while pros are medium to stiff.
The second biggest difference is the liner. Pros come with a gold liner (high density foam) while the il moros come with a silver liner (medium comfort density foam) The pro liner has the best response. but the the little bit of extra softness in the silver line is great for park and pipe riding. I know a handful of people who didn't love their gold liners and switched to silver and were very happy.
Besides that the only differences are spare parts. Pros come witha spare firm footboard but if you're riding park you're going to want the anti shock footboard either way. Pros come with a stiff and medium flex tongue, il moros come with a soft and medium flex tongue.
So it comes down to if you want a comfortable smooth flexing boot that will perform very well in the park lean towards il moro's
If you want a boot that responds the best and will perform everywhere and don't mind that its slighly less comfortable and not quite as smooth flexing, lean towards pros