According to Soccernomics keeping a clean sheet is more valuable.
At least, I think that's what it said, don't ask me to explain why
Scoring is obviously more important. If you draw 10 games 1-1 you will finish higher than another team that draws ten games 0-0, all other results being the same.
Which do you think is more valuable
Is this the one goal in April you're talking about?
If you keep a clean sheet, you only need one goal to win a game.
But if you can't get that one goal (as we've seen) drawing every game only gets you 46 points, which is relegation form.
If you score one goal, I'll say you win 50%, draw 30%, and lose 20%. Which comes to 82 points. which is promotion form.
Of course, all this assumes in the first scenario you can't hit a barn door. And in the second scenario, you can't defend for sh*t.