I prefer the ts55r to the makita.
Although when setup perfectly with a sharp blade the makita makes a better cut then the festool. The reason for this is that it has a much much harder guidance system, alloy rail groove against alloy base on one side and alloy rail groove against reasonably hard plastic on the other. When its adjusted snugly you can't wiggle it at all. Unfortunately it doesn't stay perfectly set up for long. Like others have said the adjusting screws for the cams (they aren't even cams by the way, just a type of spreading washer) vibrate loose fairly quickly, and the little plastic washers that tighten it to the rail wear out reasonably quickly. Some people might not mind replacing reasonably cheap plastic washers fairly regularly, and adjusting it to the rail every day, but it bugs me.
The 55r has a much stiffer base/tilting assembly, and doesn't bind several times when you try and tilt it to set a bevel.
Festool blades really do stay sharper longer than the makita ones, because the makita has more aggressive blade geometry, which may have something to do with the perception that the makita has far more power. The CLAIMED power difference is only 8%, cutting 42mm thick solid core doors I don't notice that much difference between them, for sure the makita is a bit more powerful, but I don't feel like its enough to matter.
My makita's base is badly grooved by the rails, and its not even, I had to adjust the saw because it wasn't cutting square anymore.
The bevel tip lock is a waste of time. You can't actually use it to cut because it is very loose in its little rail lip. Why would you want to leave your saw beveled on the rail? I take my saws off the rail when I'm not cutting because its easier to move the rail around without the saw on it. If the 55r is beveled I just sit it on its side on the bench.
Maybe in the US where the makita is considerably cheaper than the 55r there is a more compelling argument for buying the makita.
I saw a promotion a few weeks ago for the makita with 2 1400 rails, 2 clamps (rubbish ones) and connectors for a similar price to the 55r with 1 rail. I feel the price difference is small enough and the 55r is that much better that its a no brainer.
However, as with everything, your mileage may vary.