Yes,it's looking better BUT ,I always tell people when your checking tension to make sure your leather is thick enough for the thread,so you should try the larger thread on 2 layers or the thickness of the project you plan to sew.And practice alittle on that thickness before you try sewing on a piece that has tooling & is cut to size,it a lot easier than pulling out stitches or possibly having to start over.
You can see that's why the 277 & 207 combo looks better than the 277 & 277 the thinner thread on the bobbin helps to hide the thread therefore making your stitch look better as you get into thicker the 277 & 277 will look better.I know a lot of people always run a size smaller in the bobbin when they are sewing on thinner leather.277 is best when your around 3/8" & thicker the knot hides better.