Waffle slabs

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Hi We are building a house and the builder has an M slab as the base inclusion. The soil report has rated the land saying it needs an H2 slab. Our builder has installed a 4c Waffle pod slab. Does anyone know what the comparable difference is between H2 and 4C waffle slab? Are we in trouble with our build or are they the same rating? Any help would be greatly appreciated.

Thanks
Dean