Seeking advice for knife purchase

I have played cs for quite a long time almost 3-years and never purchased any expensive skins. But yesterday I was playing competitive and saw my friend with a gorgeous bayonet knife (damascus steel i think, hope I spelled it correctly) and was in-love. That knife is sick. So I never had an interest in knifes but man this one is gorgeous. I had some cash on the side and thought of purchasing it. But I am not quite sure which wear I should pick. I looked on the market and FN-MW-FT would be my choice but before I purchase I would like to ask if there is any significant change in the look between those three categories. Does anyone have any experience with this? It would really help if anyone shared their experience with this.

Thanks!
Slath