- their team will be able to provide the appropriate and up to date medical advice regarding this.
You haven't mentioned your genotype (GT1?) but the results you pulled up have the same 'aggregate' total of 96.8% so it looks like in your case the two treatments are comparable. Obviously they can't both be listed first so I suspect the program has just listed one then the other. While the numbers from clinical trials for both are relatively limited in statistical numbers, they have been proved to be fairly accurate when compared with treatment results since then across the general population.
Regarding Harvoni, Sovaldi and Daklinza, these are the trade names of the originator manufacturers for their 'branded' products. Generics products while basically chemically the same have different trade names for their products although many patients still call these by the original manufacturer names. If you look at the "Notes" section below each recommendation you will see the various generics trade names.
More specific to your question, Sovaldi (sofosbuvir) was the big breakthrough drug that is the base for many treatments but requires other drugs added to create an effective combination depending on genotype, tx experience, etc.
Harvoni is made by the same manufacturer as Sovaldi. They combine the Sovaldi with one of their other drugs ( Ledipasvir) in one pill. Daklinza is made by a competitor of theirs so a Sofosbuvir/Daclatasvir combination is not available as a one pill original brand treatment. So commercial reasons rather than medical reasons.
A quick summary of these three.
Sovaldi = Sofosbuvir (needs another drug such as Ledipasvir or Daclatasvir added so is a two pill combo)
Harvoni = Sofosbuvir+Ledipasvir (all in one pill)
Daklinza = Daclatasvir (needs sofosbuvir added so is a two pill combo)
Best wishes and I'm sure those better days will soon arrive for you.
Edit: I see Dr Freeman has already responded with answers. I'll leave this here as it may be of use to others wondering about the various names.