Source: http://www.teamvvv.com/en/news/comments/FAST-RMX-has-double-the-content-of-Racing-NEO-more
Other interesting info:
We recently added HD Rumble to the game and it made a big difference, stated Linzer. For instance, when you get in contact with something you now feel where it happens and what happens. It's not a simple On/Off rumble but you get tactile feedback about the position, where your vehicle really touched something. It adds a lot to the immersion."
Other interesting info:
FAST Racing NEO for the Wii U featured split-screen racing running at 720p and 60 frames per second (fps), however the development team had to lower the frame rate to 30 fps with three or four player split screen. Shin'en are taking full advantage of the Switch's extra power as Linzer explains, On Nintendo Switch in TV mode we now have four player split-screen, at 1080p and 60fps with much more details enabled. For worst case scenarios we enable dynamic resolution scaling to make sure the game keeps 60fps in unforeseen situations, tho that's usually not something you can spot.
We almost worked a full year on the original game to get to a point where anyone could pick up the controller for the first time and have fun from the first minute.
Ok. Day one.As the Nintendo Switch offers so many play styles and controls we kept them always in the focus. Playing with the Switch means you can change your play style or controller any time and we made sure Fast RMX makes it as simply as possible to do that. You can even setup your own controller layouts. That even works for every player in the local multiplayer mode.