Never owned either model specifically. Not have I owned Crispi’s but as for Lowa, I’ve found them to run a smidge small. I usually wear a 9.5 but with Lowa I wear a 10. Good luck, hope you find what you’re looking for.
I’ve owned Lowas in the past, they always seemed to run small.
have you looked at the two offerings from Danner? The Thorofare and Crag Rat are both made in USA and run very true to size. I put 7-miles on my Thorfares last Sunday in some very steep SoCal desert bighorn sheep country.
Hunt Zone 4 in the Orocopia Mountains.