"...spritzer..." Sierra spitzers are soft points with that wee bit of lead sticking out of the point. A HPBT has a jacket that is thinner towards the point (not always a match bullet, Sierra makes several HPBT Gamekings in several calibres). The jacket is designed to open in a more controlled manner with more penetration. Neither you nor whatever beastie you shoot will be able to tell the difference.
Match bullets aren't designed to expand at all.