Is openqueue the same as rolequeue

First of all, I'm sorry if the text isn't perfect, but I've had to translate it. I play on consoles and I'm high silver in all roles. However, I did my placement games in open queue and I'm ranked platinum 4. Is there a difference in rank between the 2 or am I outranked or underranked in one of the 2? Thanks to you and if some players want to make ranked in silver/gold on console let me know.