Hi Kyle
In fact Monzo has been around longer, though their current account was launched this year rather than last, in the case of Starling.
Edit: see below for the truth - apologies. (The rest stands though 
). Thanks @anon95680666
You’ll find a whole host of threads comparing and contrasting the two banks and for that reason, I won’t go into the analysis.
And indeed why wouldn’t you? That way you get see for yourself and in truth, there’s no reason you can’t run both concurrently - many do. Have fun with both - you’ll certainly find plenty to talk about on this and Starling’s forum.