Definitely a difference in PEY seats
Op-up to front row in PEY, and the cabin is half empty so I did a test. The front row PEY seats definitely do not recline as much as other rows of PEY seats. I tried 3 different front row PEY seats and 3 different other PEY seats (yes, the cabin was that empty despite Y being fulled.) I don't know if this is by design or a flaw, but you definitely don't sleep as well at the front-row PEY seats compared to other PEY seats. I would say the other PEY seats give you a 150 degrees recline, and the front row gives you 135 degrees recline.
Also, the monitor design on the front row seats are bad when you are at full recline, you literally had to bring your seat up if you want to watch IFE, and then down if you want to sleep, which will greatly irritate the person behind you.