As far as I can tell, gpx1.2 from MRA removes shaping points (in Garmin speak), but includes route point extensions. Those are generated as the result of routing calculations. They are in the same locations as track points would be if you exported a track generated from the route. Route point extensions are ignored on route recalculation however. That means an imported gpx 1.2 route will look just fine on import, but if it is recalculated, only the via points(Via points,stopping points known as Waypoints in Garmin speak with a flag), will be used in the recalculation. How close the recalculated route will be to the original route depends on differences between MRA and the zumo in terms of maps, routing algorithm and user settings for preferences (e.g. shortest vs fastest route) and avoidances (e.g. highways, tolls, ...). I have an XT rather than an XT2 and experimented recently with (GPX1.2) automatic recalculation switched on and the unit came up with some weird recalculations to the next Via Point but only to this point, it did not seem to recalculate the route beyond the next via point. Generally speaking I used the GPX 1.1 file type and to ensure that the XT followed the exact route I wanted I also run the track beneath the route to identify any deviations. This gives the flexibility of using shaping points to enable automatic recalculation if desired, but requires great care to be taken in route design and many shaping points to ensure the route is "pinned" to the intended roads. There are proponents of both types of file routing GPX1.1 and 1.2 neither is right or wrong try both and you will find out which method suits you best. For me I've pretty much "had it" with Garmin navigators (having used them for 22 years) and use MRA for navigation and my XT for backup, viewing a track of the route and for proximity alerted custom POI's. Garmin hardware is still great but their routing algorithms and software ecosystems for motorcycling are now a mess.....in my opinion obviously.