The M25 has made an appearance on Teclast's website and, well, it's, uh, not very exciting:
M25 ...yawn
After the sleek M30, the M25 takes a step backwards toward the styling of previous Teclast models. Too bad it's so far removed from earlier renderings:
M25...better
The clickwheel is also a puzzling choice considering the touch-sensitive controls or touch screen of every Teclast after the T29.
I think the M25 will be another model available to anyone who wants to rebrand it outside China. On the other hand, the "Designed by Teclast" label on the back of the M30 makes me thing the M30 is Teclast's own...although maybe 00christian00 can correct me.
The M25 is going to be cheaper than the M30 and will use the same Rockchip and Wolfson, so performance should be the same. Still, for an extra 100 RMB or whatever, the M30 is an easy choice.