The Prince of Wales’s Stakes at Royal Ascot features a strong field of six high-class contenders. Here is a detailed assessment of each horse based on the provided quotes, comments, and Racing Post Ratings (RPR).

1. Luxembourg (RPR 136)
   Trainer: A P O’Brien
   Jockey: Ryan Moore
   Luxembourg comes into this race as a strong contender, having posted impressive performances in the Irish Champion Stakes and the Tattersalls Gold Cup. He has shown versatility in his running style and the trainer is pleased with his progress. Drawn in stall one, jockey Ryan Moore may opt for a forward position. With previous Group 1 wins under his belt, Luxembourg holds strong claims in this race.
2. Adayar (RPR 136)
   Trainer: Charlie Appleby
   Jockey: William Buick
   Adayar, the winner of the Derby and the King George in 2021, is back in action after a comfortable victory in the Gordon Richards Stakes. The horse has demonstrated his quality with strong performances and has the target of winning a Group 1 over a mile and a quarter. With positive comments from trainer Charlie Appleby, Adayar appears to be in great shape and should not be underestimated.
3. My Prospero (RPR 136)
   Trainer: William Haggas
   Jockey: Tom Marquand
   My Prospero has shown promise, finishing a close third in the St James’s Palace Stakes and running well in the Champion Stakes over the same course and distance. Although his reappearance in the Lockinge over a mile may not have been ideal, the step up to 1m2f should suit him. With room for improvement and Tom Marquand aboard, My Prospero could deliver a strong performance.
4. Bay Bridge (RPR 137)
   Trainer: Sir Michael Stoute
   Jockey: Richard Kingscote
   Bay Bridge finished second in the Prince of Wales’s Stakes last year and followed it up with a victory in the Champion Stakes over this course and distance. He showed good form when finishing a close second to Luxembourg in the Tattersalls Gold Cup. Trainer Sir Michael Stoute expects further improvement, and if the ground conditions suit, Bay Bridge should be a key player in this race.
5. Mostahdaf (RPR 134)
   Trainer: John & Thady Gosden
   Jockey: Jim Crowley
   Mostahdaf has faced tough competition in Group 1 races without managing a breakthrough. However, he excelled over this kind of trip when winning the Neom Cup in Saudi Arabia and displayed potential in the Dubai Sheema Classic. Now back down in trip and fresh from a break, Mostahdaf could bounce back and shouldn’t be overlooked.
6. Classic Causeway (RPR 126)
   Trainer: Kenneth McPeek
   Jockey: Julien R Leparoux
   Classic Causeway is a US challenger making his British debut. Although he showcased his ability with a Grade 1 win in the Belmont Derby, he has struggled in subsequent starts. With a one-dimensional running style and a longshot status, it will be a challenging test for Classic Causeway against this strong field.

Conclusions:
The Prince of Wales’s Stakes is an intriguing race with several top-class contenders. Based on recent form, Luxembourg and Adayar emerge as the leading contenders. However, My Prospero and Bay Bridge cannot be discounted, given their previous strong performances over this course and distance. Mostahdaf, with a drop in trip, could also pose a threat. Classic Causeway is the least likely to challenge for victory in this field.

Overall, it is a highly competitive race with several horses capable of winning. Luxembourg, Adayar, My Prospero, and Bay Bridge appear to be the strongest contenders based on their recent form and previous performances. The final outcome will depend on various factors, including the ground conditions and race dynamics.

It is essential to note that racing is unpredictable, and factors such as jockey tactics, pace of the race, and track conditions can influence the final result. The information provided gives a snapshot of each horse’s form and the trainers’ and jockeys’ expectations. However, thorough analysis of additional factors and expert opinions should be considered before making any betting or racing decisions.