Lanefan
Victoria Rules
Higher? No.WotC should be held to a higher design standard than 3PP. Not the other way round.
Different but equal? Yes.
To explain: WotC's design goals are to come up with and then curate a game generic enough to appeal to a broad cross-section of players (including DMs) and further, that can and will serve as the generic entry point into the RPG hobby. Whether intentionally or not, with 5e they seem to have more or less done just that.
The design goals of most other RPG companies are to come up with a game that appeals to a specific niche of players (including GMs), and to cater to the needs and wants of those players. It's not necessarily out to be or become a generic entry point to the RPG hobby.
Thus, the degree of success of WotC's design can be to some extent measured simply by sales numbers; while the degree of success of most other RPG designs is measured more by how well it is received by the players in its intended niche.