SSD Secure Erase Performance gain - is it a myth?

I was reading some articles about secure erase and it improves the performance of the SSD's.. so I tried it.
I made a backup with clonezilla of my system SSD mentioned in the previous post and I reran Crystaldiskmark, here are the results:

The only difference between the two runs regarding the SSD was that this time I had more free space because I moved some stuff to my new SSD.

So... read is practically is the same Write is better but maybe because the more free space.. strangely the 4K write/read was better before.
What do you think?