$45 vs $450 fountain pens - Unboxing Sailor's cheapest and most expensive 1911 Profit models

Related videos: Japanese fountain pens under $75:    • The forgotten tier of fountain pens! ...   Sailor Pro Gear Slim - alternative to the 1911 body style but same section and nib:    • The Sailor Pro Gear Slim is too small...   The cheapest Sailor 1911 Profit model costs $45. The 1911 Black Luster is 10 times more! What do you get for the price difference?