Mastered Super Saiyan is far far superior & stronger than Grade 2 or Grade 3.
But the majority of DragonBall Fans keep looking it terms of strength or power failing to understand it's not simply how strong it is over another form but how it provides in terms of efficiency.
I've said this a...
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The Multiplier doesn't matter, it's about efficiency.
Grades 2 & 3 could be x5 x10 or 30 or 40, just means it takes a Buff/Boots for those states to get to that level of raw power whereas Grade 4 gets there & beyond naturally & easily without a Buff/Boots.