The databases say Elvis wore the Inca in the afternoon, and the Peacock in the evening.
However, newspaper reviews of the evening show report Elvis wore a "white suit with a sequined bird in flight, a glittering wing on either side of his chest. It is the same outfit he wears in the poster 'suitable for framing' which Presley's advance man urges the audience to buy".
(From the Providence Sunday Journal, June 23, 1974).
Unfortunately, there is no picture accompanying the review.
Perhaps the reviewer got the two-wing thing wrong, but the Peacock was the one featured in the poster mentioned.
As for these photos here, it's a little hard to tell, but it's the Blue Rainbow suit.