Its always a matter of opinion, very subjective and any relative benefit of the front SSL setup is determined by the state of your front suspension and king pins before the conversion. On my 4/4 I recently had the the king pins rebuilt (26k miles) replacing with upgraded king pins (kept standard shocks) and installed brake reaction bars and full wheel alignment and it was a step change in 'compliance' over undulating surfaces smoothing out the undulations and less bottoming out on pot holes.
My current Roadster (only had a couple of months and covered only 400 miles so far) has the SSL front end with brake reaction bars installed about 3k miles ago, there is not much in it compared with my 4/4 rebuilt front end. with brake reaction bars. The extra benefit of the SSL kit, allows a higher ride height which helps with the very low sump ground clearance on the Roadster and better Spax front shocks, but I could also have replaced the standard shocks on the 4/4 front.....so the only real tangible benefit I have experienced so far is the SSL ability to adjust ride height at the front , but some may feel that may compromise handling slightly......horses for courses.
The definition of traditional Mogans setup become very subjective, I felt the earlier 70 's and 80's traditional Morgan suspension was more compliant with lever arms and certainly ground clearance was never a concern compared with today's traditional Morgans.
