No, I am not all wrong. I have a Tokyo marui Glock 26, and It's okay, but the plastic slide is a pain in the ass because you have to use 134a gas instead of green gas, otherwise the slide can crack. The KJW is made for green gas and shoots at a higher fps then the TM.
And I don't know why TM is more expensive, for that you will have to ask them, but KJW is just as good as a TM, or better. And yes, I will get TM mags but the G17 version with a mag adapter.