There both amazing sniper rifles but i like the M-200 more cause the bolt is Really fast plus it's more accurate i can't tell you how many times ive missed a accolade cause the l9 misses the shot even though im spot on it Makes me very Rageful.
I personally like the M-200 sniper rifle. There isn't a big difference in their stats, but
I find the M-200 to be is a bit more accurate than the L9. I also love the scope crosshair (Hate the neon green scopes) and the faster reload rate.
I honestly feel like the M-200 should have a better probability rate because the gun is actually stocked to be compact (Hint: adjustable stock, carrying handle, adjustable bi-pod).