Suikoden 1 was officially released on the PC in Japanese, Korean, and Chinese. I have actually seen all 3 versions in person, I own the Japanese and Chinese versions. Suikoden II as far as I know was only released on the PC in China, again it was officially released by Konami. I own that version as well. To my knowledge Suikoden II was never released on the PC in Japan or Korea.
Both versions have redrawn sprites for better quality, as well they are displayed in slightly higher resolutions than the playstation versions. To say the least they do look incredible, especially the redrawn character art.