I looked at the Makita, Festool and DeWalt plunge saws, plus the Mafell, wch is a sort of hybrid, not having a sprung plunge action, you need to manually drop it into the work and retract manually as well using a lever.
There was very little difference between them for cutting performance with the supplied blades, the Mafell and DeWalt slightly rougher than the Makita and Festool, but negligible, and with no splintering, only light feathering on crosscuts in veneered cherry ply.
The same was seen in white faced melamine chipboard.
The Festool and Makita were practically identical for performance and action, and in fact share very similar attributes if you look at the plunge spring for instance.
The Festool is actually a very basic saw compared to the DW and Makita, and the splinter limiter for the waste side of the cut is not as good as I expected it to be, it made very little difference.
Makita's saw is very smooth, both plunging and cutting, but at the moment lacks accesories to take advantage of it, so its only a rail and saw and clamps at the moment.
DeWalt have a load of stuff available, router cradle, angle setter etc, plus, as has been said, it can work on its side for trimmng. The parallel plunge does take a little getting used to a you have to push it forwards rather than down. The anti kickback design is excellent though, plus the fact that you have two useable sides to the rails.
The difference in the cut between them all would make me discount the Festool, even with its pedigree and good accessory range, it's too expensive and the difference in the cut is so minimal. Playing around with blade configurations for different materials would also improve the cuts.
If Makita had more accessories, it would be a great choice, equal to the Festool for cutting quality but way cheaper.
The DeWalt is a little 'growly' and feels like it has a slight rattle as you use it, but it doesn't compromise its performance. On features alone, its way ahead of Festool, and has the same thought and innovation put into it that makes their battery nailguns the best on the market in my opinion.
cheers,
Andy