Both are good engines, We have all been there at some stage, I didnt have clue what to look for when I bought my first motor, Bailey's engine are little of the heavy side for me but are meant to be rock solid, I have a polini thor 100 and yes its had a few issues but all motors do!
Whats your budget? whats type of flying do you intent to do. For me I would not prefer a light weight motor with a good local support agent who can get parts near by ie Parajet, custom air etc