Alphacool XFX 7900XTX waterblocks, Can anyone tell me the difference ?

So I have the XFX 7900XTX MERC and plan to watecool it sometime soon’ish (will be my first Custom loop) and I haven’t been able to find any other blocks for it than the two alphacool offers, one costs 160€ and the other 200€, but other than aesthetics I haven’t been able to figure out what makes up that 40€ price difference, does anyone know if there is any performance difference between the two or if those 40€ are just purely for the aesthetic differences ?