Pete, I'd think that a mildly spiced sauce would be more versatile.? The final dishes would have less in common.? But so far nothing has been predictable/logical about Indian cooking, so why should this be?
Timing may be the key factor, as you say.? Sometimes the food from our favorite Indian restaurant doesn't taste quite right, and we say, "Must be a different chef."? Maybe it's the same chef and his timing's off.