I've done 5000km's on Trail Wings on my VStrom and, on tar, they're fantastic. I've done the BMW Off-Road course and done two off-road rides and on all occassions, have found the tyres to be superb.
Bridgestone continue to be a leading bike tyre manufacturer who have been the exclusive supplier for my RT and other BMW's for the past 200,000 miles. They've revamped the entire model range by improving on what are superb tyres. The BT020's I've always run on the RT are now replaced by 021's.
If Bridgestone have changed the tyre, its for the right reason and, if its an improvement on the TrailWings, they'll be really good.
Cheers
Lawrence