Pity that you used the comparison view in Antutu and PassMark, the details view would be more useful.
I wonder why the Vellamo Metal score is so high compared to the Hero 2. Did you check /proc/cpuinfo to see what CPU part ID it reports?
I manage to disable the bloatware in System menu but I can't remove them with ES File Explorer and Titanium Backup, what should I do?
I have a touchscreen issue with the AC charger, I would not recommend to use it.
Sounds like the tablet isn't rooted yet.
People have reported before that Ainol's chargers aren't very good and interfere with the touchscreen. It's a good idea to not use them.