I have not been able to test at very long ranges. But using same rifle same day and sandbag rest the difference was about 0.5 MOA.
That's quite good considering the price difference. But you do need to spend the time batching them in to same weight loads. Tolerance +/- 0.1grain
If competing you need to ensure you have enough of the same batch for practice, the match and a few spares. All the odd rounds or small batches are kept for fun shoot's or mates that want to try out the rifle.
With the SMK it's load it and shoot it. There weight variation is minimal.
However both types need some experimenting with powder and load to get the best results.