Yes, it is most definitely quite bright, lots of upper mids, bright but not harsh treble, not very much bass. It's quite a punchy, in-your-face, modern (not very modern, but not vintage) type of sound, IMO.
As far as I know, it sounds nothing like a Painkiller (although I have not tried the Painkiller, nor am I likely to).
Whether this is regarded as a good or bad thing will depend on your guitar, it generally seems to be regarded as best suited to Les Paul types.