I implemented full control on bp by writing the perfect syntax for faster reading than Rich Text Block can boast of, and therefore I think that they are about equal in terms of costs. I had to use TextBlock in bp because I can’t even create my own with a minimum (without hyphenation, without underscore) so that costs are lower than Rich Text Block
Therefore, I recommend to deal with the implementation on Bp, After understanding, you can adapt it to any needs with the text!