I bought a slightly used 2007 Yamaha YBR125 model and I'm doing some minor repairs.. and yes, they do look very similar to the Manesia ones, almost identical.
They are different in terms of installation though, as you screw them in a fixed position while the Manesia ones are free to move.
Their price reflects the quality to some extent, but for now, everything is going well for one month.
The issue is whether they can withstand the conditions of rain - sun - rain for a long enough period of time to make their money worth it.