SLK solo damage difference

Hello guys I have done a full solo two times now and both of them I ended up with a bit less damage than other solos with SLK. The first time I didn’t start the fight immediately so I thought someone did some damage before I started my run, but today I started at 100% of P1 and finished the whole raid. Both times my final score was 169,790,421 while the other solo was 170,274,162