About MW2182 and YFB821

[Arthur plays tuba]

These two are new F horns. Anyone of you have played both of them? Which one would you prefer?

[Arthur plays tuba]

I know these two horns are not really comparable, but my friend here in Hong Kong is searching for a 4/4 F horn. Any suggestions? He tried a YFB621 before, but he think that there must be a better horn than the 621.