Solo climb Flex queue vs solo/duo

Anyone try and solo climb both queues this season? How has your climb gone? Similar difficulty to climb both or is there a difference?

I recently got gold in solo/duo and thought about maybe trying to get gold in flex as well for double rewards. Problem is I am currently B2 in flex so it will take a good number of games. That and it seems like matchmaking is more random. I was duoing with a buddy in it recently and some games I would get high plat or low diamond players in my games even with silver/bronze mmr because they had low mmr for flex queue as well. I wouldn't say it ruins games but it can make some games more difficult to climb when their is higher ranked players on the enemy team. I am sure it works out in the end to be about 50/50. Don't really want to play more games than i have to so not sure what sort of grind flex queue is. Both queues probably similar grinds in the end, at least for low elo.

Just curious what other players experiences are trying to climb both queues.