Does poison and burn inflict the same amount of damage each turn?
Yes Poison Takes away 1/8 of the Pokemon's HP Per Turn. Burn also takes away 1/8 HP, but also halves the Pokemon's Attack.
being burned lowers your attack.while being poisoned does not,howerver there is a move that makes your poison status even more critical.venoshock http://pokemondb.net/move/venoshock