Not that designer clothing is worth the price much of the time, but you can tell the difference from cheaper brands. Especially in the style and cut. Buy on sale.
Back on topic...
Maybe you the difference is more subtle between similar products, but using two different combos, the look is very different for me. Especially on black.
For example, if I do a Meguiar's detail like #9, #7, then topped with one of their carnauba products, the look is quite different than when I do Menzerna PO85RD topped with Zaino Z2P.
However, the difference between Z2P and FMJ is more sublte, but noticeable.
Finally, the slickness and durability of products vary dramatically.
- J