Although it is no where near the level of finisher as a Baneslayer it is much more reliable value and immediate tempo, the latter of which is especially important against the decks you are playing life gain against
Its also uncounterable, making it a mirror-breaker in control matchups
For the purposes of playing, they are equivalent to one another (that is, you can still only play a maximum of 4 copies in a deck no matter if you are playing the Godzilla Series or Ikoria versions)
Even at two life and a creature, Razaketh, the Foulblooded setting you up for something broken
All in all Im never excited for 5 mana Wraths, especially since we havent seen one go above its pre-sale price in a long time
Vazi gives opponents Treasure tokens, which usually spells disaster for you, but it then buffs creatures and draws cards whenever opponents use their Treasure