In reply to martinlird: You're not being a plank but it is a comparing chalk and cheese job.
Scotland feels more scary because of the weather,dodgy snow,short days and Alps feel more scary because of the altitude and size - long routes, glacier approach in in darkness.
I've spent more time in Wales than Scotland and nothing there on the commonly frequented winter walking routes (even Crib Goch) would rate a PD.
Any difficulties are very short and there's no need for pre-dawn starts.
I haven't done them but the Snowdon Trinity Face routes look quite technical, however they wouldn't get an AD apart from on those (technical) grounds because you get to the top and walk off. There's a bit more to PD and ADs than that I think. Wales (and much of Scotland?) is more like 'winter cragging' than alpinism.
Paradoxically though many say alpine PDs are good training for Scottish Winter routes. I'd rather do an AD than a steepish Scottish or Welsh gully, all the time wondering if I'd judged the snow correctly.