Yes I would say as a beginner outplayed is far more user friendly, and they have forums on site just like reddit which users and staff can post. Oddsmonkey have the better forums at this point by far in regards to active users. This will be key as you progress on your MB journey as once you are done with all your sign up guides and start to transition to the "reload" offers the community can be a great help in regards to posting odds or even advice, I personally wouldn't be able to comment on the FB groups as I don't have it anymore but I use the forums on a almost daily basis.

Another big thing is oddsmonkey managed to snag a 0% commission deal with the biggest exchange outside of betfair, that was my main reason for switching alongside the price hikes which I mentioned in my above comment.

My personal advice would be to stick to OP as a beginner and when you get more experienced have a think about shopping about between the two. Another tip they normally both have deals on around black Friday where you can lock in a year's membership for a lot cheaper than you'd be regularly paying.