Hi Goldie. Most people (and the books) say it's easy to separate PB and SPB, if you see the undersides. Well, I'm one of those people who's rather poor at ID - I also have difficulty recognising people! Apparently, there's a special part of the brain that helps recognition of faces and I don't think mine works very well.
The problem here is that your first photo is a rather old and faded specimen of a PB, so what should be stronger yellow and orange areas look rather like the extra, pale 'pearls' of an SPB. It is just the overall lack of contrast that leads me to say PB for this one. The second pic has much stronger contrast, with almost brown areas around the 'pearls', which leaves me in no doubt that this is an SPB.
I'll not be too surprised if someone says I'm wrong - it happens frequently
Mike