Either will do well, but the difference is what they do. The bullet/crimp combines 2 steps into 1 die and you may see an incredibly marginal difference in consistency. The other, you use the bullet seater to seat and then the crimp die does nothing but the crimp so the bullet depth is never touched.
99.99999% of shooters will never see a difference in downrange performance.
I've got over 40 years of reloading experience that say Lee's, 'factory crimp die' is for reloaders who don't really know what they're doing; well, either, that or they're attempting to use sloppy Lee dies to produce decent ammunition with - in the first place. I have produced, probably, close to a half-million rounds using properly set up RCBS and Dillon die sets without ever once needing to use one of those ridiculous Lee SQUEEZE dies. If Lee made their sizing and crimping dies correctly it wouldn't be necessary to have to squeeze everything one last time in order to make it work.
Switch to another brand of reloading dies; set them up properly; and you'll be fine.
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