Clubs with different names started out at a different star ratings.  Prickle clubs started out as 4 star clubs, and Vixen's started out as 3 star clubs. See this table for reference:


Original Star RatingName

Keep in mind though that a prickle is not always superior to a vixen! Generally their base stats are higher, but rarity comes into play too, rare or legendary Vixen with bonuses to a stat you like, for example Putt on a Putter, could be higher than a higher star rated club. You can always evolve your clubs to increase their star rating as well, so you might want to keep an old favorite if it has rare bonuses to stats you like!