What is the difference between dynamax Pokemon and gigantamax Pokemon?

Question

Also, do all the stats of a Pokemon increase by a certain amount like for an example, 50, or, when they dynamax/gigantamax, or does it even raise stats at all?

Comments

Dynamax is the mechanic while gmax is a variation that was intended mainly so gamefreak could have another excuse to indulge their Charizard fetish and make it a new design. There are also gmax moves that are unique to one species but other than that, they're identical

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The only stat that dynamaxing (or gigantamaxing) increases is HP, starting at a 50% increase at a dynamax level of 0 and incrementing up to a 100% increase at a dynamax level of 10. None of your other stats are affected.

Answer 1

The only differences are the appearance of the Pokemon, a STAB move being changed into a gigantamax move, and HP increasing (that applies for dynamax Pokemon too)
Source: Experience (I've dynamaxed and gigantamaxed countless times in sword)