Paramo is like wearing a microfleece and a windshirt
A 60g primaloft top is the same
the big differences are waterproofness, breathability and packability. They have very different purposes
For an all round top I’d say 40g was too cool. I’d be going for a 60g or 100g top. To be honest, in that range there are loads. Think about fit (long arms, slim cut, drop tail), options (pockets, hood) and function (i.e. pullover smock or jacket)
I find jackets more versatile, but they are slightly heavier and pack down ever so slightly bigger. But easier to put on and ventilate