Good idea I S'ppose--might want to ratchet up the experimentation, though.
Features? Typically a high power-to-size ratio (more powerful than most), usually an ergonomically friendly and compact housing whatever size model, and very well made gear housing which means less 'gear play' (less the better) and more stability as it has a more efficient energy to movement transfer. Also, where most other brand angle grinders might not have anything memorable about their cosmetic aesthetics, this brand has a rather attractive Green and Black color scheme, possibly with surfaces to enhance your grip depending on model. Depending on your particular model other benefits will apply as well. You'll have to pay more, but it may well be worth it. Consider it the top of middle line or bottom of the top line in angle grinders. Best of the practical worker's lineup anyhow.
Making a sequel to the Angry Cat Man SMB1 vid on my page.