Best boots for high desert

[balderdash69]

I will be doing a course/competition in an orienteering course in high desert environment with loose sand and mountains. I was planning on using my reliable salomon quest 4d 3, which they sadly don't make anymore. I have a pair of kennetrek mountain extreme 400g that I've never wore and am looking for a 2nd boot since I want a reliable backup. Would those be too cumbersome/heavy? My other thoughts were Lapponia 3 since it seems like the Quest 3. Other thoughts were Crispi Nevada. Appreciate all the suggestions.