The bulbs aren’t much brighter than stock, but they are a little. They just look newer, more modern or whatever you want to call it… 
And they’re full-out blue, border-line purple-ish, they don’t come out white unless you buy the white ones!
I left the other smaller bulbs alone. The only side effect was a little fade from blue to white on the very bottom corners of the cluster. Doesn’t bother me!