I've used both and each has their small issues. Kinetic pullers are cheap and work but sometimes mar the bullet nose even if the bottom of the puller is padded ( I used and old ear plug.) Collet pullers are faster and less messy but may slightly mar the bullet but my limited test show nor accuracy change out to 300m , so if I were you I'd get collet puller for volume use, if the bullets are very hard to remove setting them back in the case with your bullet seating die will usually help break them loose from any sealant or corrosion that may be present.