があっての? is it the same as あっての?

Question

勝算があっての判断か

A character is commenting on the other's plan and says this. Does があっての here have nuance as Nounあってのnoun?

Answer 1

They are more or less interchangeable, but there are different tendencies in usage. In AあってのB, the absence of が adds a literary flavor to the sentence (が was not a subject marker in classical Japanese). And the use of classical grammar also suggests that an idiomatic meaning is intended. On the other hand, AがあってのB is a phrase that follows contemporary Japanese grammar.

Therefore, we can say the following:

• When the phrase means "A is what makes B possible" or "B is impossible without A", AあってのB tends to sound more idiomatic and sophisticated, but it's not wrong at all to add が.
• When the phrase means something simpler such as "B based on A" or "B after A", AがあってのB tends to be chosen, but が may still be dropped to add a dignified flavor to the sentence.

I think you can sense this difference by looking at the links posted by Chocolate.