3s are naturally “pseudo-Social”, in the sense they have an eye on whatever their culture deems as “success”, and they will try to adapt to that. In that manner, a 4w3 has a much greater awareness of how to sell themselves and their art, for they have more of a focus on the culture’s ideals of success; and being like a 3, they typically have internalized those ideals.
Social 4w5s may also be aware of those ideals, due to the Social instinct; but there is typically a reluctance to fully give in to those ideals, they are not the main focus for them. They’d rather focus on what appeals to them personally and bring that to society rather than what is already appealing to the public. 4w3s tend to deal much better with outside expectations; they are much more open to catering towards them. 4w5s are more attached to delivering what they perceive to be deeper “truths”.