High beam halogens are high beam halogens. The Silverstar ZXE's are the same wattage, but I believe that they get the higher color temperature by using a thinner element, so you sacrafice longevity with brightness (and it is worth it, by the way).
I had Cool Blue on my '82 Mustang GT (this was before Silverstar came out for square headlights)
I had Silverstar Ultras on my '03 Ford Focus, and '96 Mustang GT
I had ZXE's on my '08 Matrix both high and low beam.
I never had issues with those bulbs causing problems or trouble.
What we were talking about was equivalent to throwing halogen bulbs into a reverse light socket, which would be bad.