I asked the Japanese players about this, and they told me that the balance was done for a few reasons. One, Solar Prince is more rare, but slightly less powerful than Ruby Carbuncle in the first set. Seems a strange thing to say, right? But remember, Ruby Carbuncle has strong HP, good agility and his Auto skill will give him DF and the soldiers on either side of him defense every round, for free. He's a very solid, bread and butter card that is key to establishing a front line in set 1. Verlaat, on the other hand, is far too weak for the front row, and he's only got a RNG of 1. His Protection of the Sun power is kind of awesome, but in reality, it only is useful when you're up against Lawtia, and only if they're using Lycanthropes, and only when they don't have [card=26]Eskatia[/card]. Now, keep in mind, in that one particular situation you will rip it up, but otherwise it doesn't do anything for you. (This will change in later sets, with sun Lycanthropes). Now, I personally like his healing power, but there are other cards who can heal and it's more of a late-mid game power.
So, they made him a great soul card to make up for it a bit.
Now, I still felt it was weird that he had the exact same power, with no difference except the LP. So I asked them about it. And they said "Are you so sure having 2 LP over 1 is always an advantage?" and then "Is it more important to have the most LP, or is it more important to always know exactly when your Soul Skills are going to be activated?"
Then I realized that if I keep asking questions like this they'll probably make me shave my head and go off in the mountains to live in a Buddhist temple for 10 years... which would probably delay the Beta, so I decided to shut up.
"Scissors are overpowered. Rock is fine." -Paper