Slimcoin is not a POB only coin. In addition in slimcoin; POB is dependent of POW that makes Slimcoin definitively not a reference for the Proof-of-burn concept.
That's true, but the price-stabilizing effects of PoB (my hypothesis) should apply to Slimcoin, as there is a significant variation of coin circulation / supply due to PoB (as of now, about 1/3 of all available coins are burnt after only 2 months).