You Get What You Pay For
Price is an accurate measure of quality when you are comparing compound miter saws. This is a competitive marketplace -- enough so that manufacturers have to create crisp features to set their products apart.
If a manufacturer wants to deliver exceptional quality, it probably has to include high-quality parts that cost more, ultimately resulting in higher prices.
Over the years, I have never been disappointed when I have paid more for a high-quality power tool. I want to know it will be durable and produce accurate work.