I use his Ocean theme.The 1st one you linked is for a horizontal screen & I’m using it on the Therion 75C. But the second one you linked looks interesting ! Sir Timmy Timbit has nice themes @TrollDragon uses one of them. Let us know which one you pick to keep.
https://forum.evolvapor.com/files/file/418-material-ish-ocean-dna75c-dna250c-optimized/
I changed the lock screen for a little Masonic influence but kept everything else the same.