I've never considered either of those two models. But, I think for the money, you might want to consider a little bit larger model. I've heard of lots of folks around here, singing the praises of the Hovabators and even some of the Little Giant models.
I have an LG still air at the moment. I still can't put eggs into it due to its refusal to hold a steady temperature. Hence, I'm putting together a design to build my own cabinet style bator.
A cabinet style may be far more egg capacity than you want to consider, but there are a great many designs for smaller bators, made from something as simple as a Styrofoam cooler, on this website. You might want to consider checking them out.
This might be a better option for you all the way around, especially as you home school. In building your own bator, you'll be teaching your sons more than just the marvels of nature in hatching out chicks. You'll be teaching them valuable lessons in self sufficiency and resourcefulness in building your own!
Here are links to two pages here that you might find very useful, if you weren't already aware of them:
This first is for various home made incubators that members have built. The "Chic Chick-Bator" is my personal favorite. Mainly for her concise list of materials needed to build it.
https://www.backyardchickens.com/chicken-coop-incubator.html
This next page is a list of some of the very best pages from this website and others regarding everything hatching. Much of it I would consider in the "Must Read" category, but some of it is just a rehashing of ground that has already been well trodden, but still worth looking at for a refresher course.
https://www.backyardchickens.com/forum/viewtopic.php?id=48726
I hope that information helps you out a bit. Good luck on your first attempt. Let us know how it goes!