A big difference I noticed that they are now using a Durga style inward suspension mounts. It's no longer has the bridge style mount going through the belt like on the TA05 and TRF415. Instead there seems to be two separate mounts on either side of the belt (ala DB-01)...
I do like the narrower chassis. But as you can see the cantilever layshaft system means you must mount your receiver on top of the servo...