iwould keep the kjw personally and trade for a kjw 1911 if that is what you want
I dont know ive had the m9 for a while and dont really like the look of it even though it performs amazing, i love the look of the gun this guy has the tan is beautiful and im a BIG fan of the 1911 but i have no idea on the reliability of the We tech pistol series
From my experience the kjw 1911 are just a bit better build quality over the WE also the mags are double stacked instead of single stack. I might be biased since i fix ten times more WE then kjws since that is what my work sells but I currently have a kjw that is two years old in right now and the nozzle hasn't even broke yet.
I second everything Icorus has said. Stick with KJW. My KJW 1911 has been through hell and back in the year I've had it, and still performs like the day I bought it. I even lost it in the desert once for about an hour. After baking in the hot summer sun and being covered in dirt, I dusted it off, chambered a round, and it still fired like a dream. Thing's built like a real 1911 haha.