I don’t know anything about that Honda, but looks like it’s heavily based on their MX bike? I’m sure reliability will be fine, but maintenance might be high.
Have there been concerns with reliability on the Betas? I haven’t heard anything. In general, I’d be less concerned about reliability on a two stroke (even an Italian one) than a high-strung 4 stroke (even a Japanese one.)
Have you ridden the Beta? I’d probably base my decision on which was more fun to ride, and which was the cheapest/easiest to maintain. Parts availability may factor into it as well, but seems like Beta has a good dealer presence here these days. And even when my wife had her oddball Ossa, it was no big deal to get parts sent from the States if the Canadian distributor was out.