If you are crimping the same amount it makes absolutely no difference whether it is a roll or taper crimp, it works the case mouth the same amount.

If you are worried about over-working brass find a source of once-fired cases and buy a bunch. That way you will never use any individual case enough to get neck cracks, and even if you do you will have plenty more for spares. I have several thousand, probably 15,000 or more, .38 cases which I have had most of for nearly 40 years. In this time I don't recall ever having a neck crack, and many have probably not been loaded 2-3 times each even though I have loaded and fired several hundred thousand rounds from them collectively during that period. The majority of this brass is mixed range pick-ups from who-knows-how-many-times-loaded commercial reloads to begin with.