I have taken both the NET and the TEAS in the past 3 months. The NET was easier in some ways and more difficult in others. The math on the NET was easier, but the reading section was reasonably difficult. On the TEAS, the math required a lot more specific information like knowing conversions(quarts, meters, etc...). The tests are definitely comparable. If you are prepared for one, you are most likely prepared for the other. The best piece of advice I can give is to go online and find a middle school math website that has practice questions. That's all I did and I did well on both. Oh and also take a stop watch to the tests... keeping track of time is very important. In regards to study guides, I didn't get a study for the TEAS so I can't recommend one. I hope this helps!