Same TDP for 12-core and 96-core part, with same boost clock and ~x2 difference in base clock? How should this be read? (because it would suggest 96-core part

Same TDP for 12-core and 96-core part, with same boost clock and ~x2 difference in base clock? How should this be read? (because it would suggest 96-core part is ~4x more energy efficient while running @ base clock? Doesn't seem right)