Usually when you get regular Halogen bulbs that are "blue," the glass is just tinted and the amount of light they put out is actually less than stock/clear Halogen bulbs. In the case of Sylvania Silverstar Halogens, the glass is slightly tinted blue, but the light output is actually a little higher than stock, so they appear brighter, but the down side is that they don't last as long. If you want really intense white/blue light, I'd suggest a 4,300-6,000K hid kit.
But to answer your question, nope, I don't have any experience with any of those bulbs. Would you be getting them for your low beams, high beams, or fog lights?
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)