Question Azure Playfab versus Smartfoxserver for mobile android

We are trying to compare these two backend services for multiplayer mobile racing games and need some input as to which would be better and more cost effective. The Playfab looks like it is built mostly for windows pc, and using it for mobile seems like a nightmare. Playfab has so many add-on costs covering multiplayer services, it I don't know how anyone could estimate costs for using Playfab. Smartfoxserver seems more straightforward for mobile and the cost seems more upfront. I also don't like that there is no way to contact Playfab to ask questions. Does anyone have an opinion on which one is better? Gamesparks is now dead for use, so it is not an option.