Are goat and StockX the same?

I'm curious to know, are Goat and StockX essentially the same platform or do they have distinct differences in their offerings and operations? Are they both focused on reselling sneakers and streetwear, or do they cater to different types of collectors and enthusiasts? Additionally, do they utilize similar technologies and security measures to protect buyers and sellers? Clarifying these points would help me better understand the nuances between the two platforms.