original X100; highest sync speed with RF 603 II or YN 560 TX (II)?

[alwinvrm]

I still use the X100 because I like the sensor and the camera as a whole.

I read everything I could find about YN triggers but in view of the camera's age, many threads are quite dated and predate the 560TX.

The title is the question: Which trigger would give me the highest sync speed with an X100 and YN  560 III flashes, the RF 603 II or the YN 560 (II) TX?

Any other (dis)advantages you could think of are of course welcomed.

This my first post here, so a brief intro. Some of my pictures, both film and digital, can be found on flickr alwinvrm. I have the X100 an XE1 with 5 lenses, a Nikon1 system with 3 cameras and some lenses. I also still have probably every film camera that I found noteworthy at some point, Rolleiflexes, Hasselblad, Olympus OM system, Nikon system, Yashica electros, Konica Hexar, Canon and Konica rangefinders, Leica Ms, etc.