Prendas and Shutt don't seem natural bed fellows to me, but then maybe that's the point - choice.
I have a Shutt autumn weight, long-sleeved shirt (I don't think they make it now) and it is quality through and through, a stunning bit of kit - but to the point that I'm afraid to wear it! (keep it for Sunday best!) Which is just as well because, in practice, it's actually quite limited in its range of use. It's warm but not hugely windproof, so often needs twinning with a gilet - and then I risk getting too warm!
Prendas - all cyclists love the retro kit, no? I had a couple of caps from them, bought yonks ago, but nothing else. Just looking at their website now, the prices have gone up some from those that I remember, so maybe not such unnatural bed fellows for Shutt.