I've had both recently 35 KM2's and now 37 Toyo MTs and both are great tires. When the same sizes are compared the Toyos are heavier but they are also a true 35 where as the KM2's are more like a 34. I'm not sure with the 35's but the 37's are also an inch wider. I was amazed how nice the KM2's hwy ride was and how quiet they were but I was a little more impressed when I slapped on the Toyos, plus I too like the the look of the Toyos better.
You won't be disappointed with either, good luck.
"My soul finds rest in God alone; my salvation comes from him. He alone is my rock and my salvation; He is my fortress, I will never be shaken." Psalm 62:1-2
"All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke