Any experiences with Inov-8 bare-x shoes?

Looking at the tread I wouldn't trust any of the bare-x shoes for hiking. They would be abysmal in anything but the hardest packed trails. So any mud would be a slip and slide mess of stumbling around. They don't even give them a single check mark for "soft" ground (check the inov-8 site, they rate the shoes for three terrain categories: hard, loose, and soft).

In Oslo forests I'd expect you'd have softer and looser ground which is why you like the Roclite treads.

If you have hard pack and want light, maybe the F-Lite series. If you have a lot softer and looser footing maybe a bare-grip 200 or X-Talon would work. They don't have the anatomic fit yet on any really low weight shoes for off road yet. Maybe the trail-roc coming out later this year would work for you. For now I'd just size up a bit if you want something immediately.