I've noticed a lot of the blood parrots LFS's are selling are the one's without the beaks.
They got their names for having those beaks and they cannot bite you, even though they may try...
It looks to me like the one's without beak shaped mouths COULD actually bite.
I had 2 Blood Parrots with the beak shaped mouths. Bought them small and started them in a 29 gallon, then up to a 55 and then a 90. They were the most personable fish I have ever owned.
I wouldn't think keeping two in a 55 would be too terrible if they had good filtration and you keep up with water changes. Of course, bigger is always better for them.