The term "better" is not of much use. No two people define it the same way. It comes down to what you prefer. Roselau is consistantly "better" than generics. But, you can cryogenically treat generics, and they sound good too. Maybe try those and see if you notice a difference(sold thru sites like AACM or Silverbush).
Hi, Roselau is generally 'better' and preferred by many. There are different types of wire from Roselau though. . .you can get their standard wire through www.fortepiano.com
Pyramid strings are made by Roselau also but formulated from different alloys and are much better in my opinion. You can find them on my site and others, I also have MA wire only from Pyramid. . .
