If you use a Lee Factory Crimp die and set it up correctly in the press so that the handle is fully cycled then neck tension will be the same providing your cases are trimmed to the same length. The Lee dies produce a parallel crimp unlike the roll type crimp produced by a standard seating die which can actually open up the neck. The lee dies can also be used on bullets that do not have a cannelure.
In my 338 Win. Mag. I find that without a crimp, if I fire three rounds and check the fourth round before firing, the bullet will have been pushed a small amount into the case, especially if the bullet has a stout nose which doesn't deform easily. These rounds are not super hot either.

Waidmannsheil.