This isn't supported in canon, but your question makes an underlying assumption that ALLall hobbits are 100% the same, which I feel is not a correct assumption.
In reality, hobbits are humans (from JRRT's "storytelling" point of view, not in-universe-biological one). And one thing we know about humans is that 1-3% of them are sociopaths/psychopaths, who would gladly kill a personwould gladly kill a person for a pretty ring even without the ring being Sauron's One Ring.
So, it's just as plausible to explain Smeagol'sSméagol's behavior by his innate negative qualities, as it is by the Ring somehow acting very differently on him than on Bagginses. This is reinforced by several different points from canon:
We know that the other Rings amplified their wearers' attributes, e.g. Dwarves' greed... so it's possible Thethe One ringRing amplified Smeagol'sSméagol's sociopathy.
This was alluded to pretty explicitly by Tolkien himself. In a letter to Michael SraightStraight (Letter 181), Tolkien writes:
The domination of the Ring was too much for the mean soul of Sméagol. But he would have never had to endure it if he had not been a mean sort of thief before it crossed his path
We see the same existence of good/evil individual in Men in Tolkien, in general.
Grima Wormtongue is one example. The Witch-Kingking of Angmar another (even pre-Ring). Haradrim are considered evil though that's probably just Propro-Elvish propaganda.
- Or, hell, even in hobbits. Ted Sandyman and Lotho Sackville-Baggins are seen as bad hobbits.
We ALSOalso see how the ring amplifies the natural negative qualities and behavior in everyone:
Humans: the lure of the Ring and its power affected Boromir vs. Faramir differently. Or Denethor (at a distance, natch) vs. Aragorn.
Even Wizards (Gandalf vs. Saruman, who wasn't even near the Ring)
The Ring didn't cause other heroes to murder either - it was seen, aside from Bagginses, by everyone at Council of Elrond; by Galadriel; and Samwise Gamgee didn't seem affected at all, even less so than Frodo.