The answer from your Doctor may be 50/50 with a leaning towards Pegasys, I honestly think they are just better at marketing than Peg-intron. This study and a few others suggests that at least for genotype 1 Peg-intron is “better”.
Overall, genotype 1 patients treated with Peg-Intron were more likely to achieve sustained virological response 24 [...]

I’ve not been at my best the last couple of weeks. Really haven’t felt well at all, like an extra layer of sickness that sat on top of the treatment and has made me very very tired. It seems it may have been a viral infection, both the kids had it and the GP [...]

All quiet on the western front…..
Not a lot to report really as we head towards injection 34. I seem to have settled down pretty well after switching Interferons although it has to be said I am generally feeling very tired. Having said that its the sort of tiredness that you can take a deep breath, [...]