the green ones are different from the red ones, atleast they can be. you can get both kinds at food city and ranch market here.
me and my wife peeled 13.5 pounds which yielded 11 pounds of peeled fruit. the color is a purple color for sure, it's about to get deeper purple.
I took a tip from olllllo and froze the fruit and defrosted it a couple of times to break down the cell walls. Then i brought the fruit to just below boiling point for about 10 mins before cooling down and putting it in the primary. Added pectic enzyme and nutrient and energizer etc.
I don't think you need to boil fruit you have to peel, should be sanitary inside right? i heated it up just in case tho, might as well be extra cautious on something that takes a year or two.
The prickly pear mead i had at this years homebrew oktoberfest was so smooth and drinkable. I mean, i could drink this stuff like beer. I am thinking it couldn't have been more than 9%, it tasted like it was about 7% but it could have just been well aged. It was kegged and lightly carbed, best mead I have ever had.