[Diamond18]

I recall that in one of his letters Tolkien described Deagol as having a "mean little soul" and that he had begrudged the gift that Stoor tradition dictated he give to Smeagol. Tolkien then said that Smeagol had a "meaner, littler soul" (though I really don't think he used the word "littler"...that just seems right to my odd little brain).

So I have a feeling that, had Deagol had the time, the Ring would have had its way with him. Not to the extent, perhaps, of Smeagol, but certainly more than Bilbo, who was an exceptional hobbit.