Not the same at all, the TX8 is not designed for the goal of most accurate reproduction of sound (like a studio monitor would be), it is instead designed for loudness with a compromise in accuracy. I went this route as well in the beginning and settled on an EV zlx12p, I use that for shows, the 8" stage monitors I tried sounded off in some way (though I didn't try the high end ones like the K8).

Stage monitors can get loud, and the way they sound at bedroom levels is way different than they sound when cranked. There is also a difference in sonic signature at low vs high volumes with studio monitors but it is lessened somewhat, partly by design, partly because the volume range is less than stage monitors.

I have found the sound I get when tracking the 11r sounds most like the sound I get from an 8" studio monitor at low to moderate volumes, thats just my experience..