Bit of a small sample size for golovin in that comparison. I reckon he is the better tackler and more combatative in general. Meyer is the better player right now but also bit of a lightweight, it comes down to what we want.
If we want a Santi replacement than go for Meyer
If we want a more robust all action midfielder then well lets just say i liked what i saw from Golovin.
Unfortunately they don't have data on the russian league. Meyer is more of a CDM/CM while Golovin is a more attacking player. I think you could see that vs CSKA.