In style (you open most rule of 19 hands unless there's a good reason not to) you open 1♠ in first seat (4 card but if only 4♠ will be 15+ points).
Partner responds 4♣ showing 4+ spades and specifically a void club aspirations beyond game, say 12+.
Do you feel your hand has got better, worse or stayed the same ? You have what might well be wasted values, but a lot of losers just disappeared.
The purpose of the question is that my choice of responses would be 4♦ (my hand hasn't got so much worse in the knowledge you have a void club that it's no longer an opening bid but I have 0 or 3 key cards outside clubs) or 4♠(it has got worse by enough).
I wasn't particularly happy with either choice.