Check out the Comparison Chart with the numbers assigned to each ski along with the comparison Grid to get an overall visual on the relative speed vs stability.  For example you can see that I rated the SR as the most stable since it at the top of the chart in terms of stability.  If you look at the SEL, I rated it the most stable of the High Performance Skis while being only slightly slower than the SES Ultra and others that rated a maximum 6 on the speed axis. 

Click to Visit Surfski Review Page with Full Size Charts and Tables:

Reduced Version of Chart - Visit Surfski Review Page for Full Size