Viennabow VB6115 Carbon Cello Bow 4/4

The first one :
The first on I got was set up wrong : the hair was to long and lose, and no amount of screwing made it playable. Following my luthier's advice, I sent it back.
No problem there ; Thomann's service is great. But still.

The second one :
So they replaced it, and it is now usable.
It is rather light, but not to much. The flexibility is good. The balance is far from perfect, but acceptable.
I was ok with it until I showed it to my teacher. I didn't tell him the price, or anything. Just gave him this bow and the 29€ Artino cello bow I had before. He played both for a while, and said he couldn't really find any noticeable difference. That was a bummer. He told me I could use the one I wanted, but didn't care for one or the other.
So I know bows are a matter of taste, and of fit with the cello, shure. But since this one is 10 times more expensive, I hoped for, at least, some clear cut, objective advantage over an entry price bow.
I like playing with it, but nothing spectacular here.