My 2014 beta 125 is brilliant! A really nice well balanced bike only fault I've ever had is the gearbox went in May but was replaced by beta uk free of charge on warranty the day after!
I wear gaernes and I have never had any problems apart from I have seen people with the sole falling off and scuffing easily I have never hit my foot very hard but when I have ht tithe gaernes have protected me well. Before gaernes I had diadora mx boots which were very protective
I think mots is good summer riding clothing only problem I ever had was they ripped quite easily. I wear the new style airoh helmet which I find warm in the cold and breezy in the summer
I don't know much about any of these bikes but we used to have a beta minitrial it was fine but we found it quite dangerous as it was my brothers and when I got on it it was very hard to control. As for the gas gas I haven't heard any bad reports on them and they seem a lot safer