In addition to different engine and prop combinations other factors which have changed since the early Sportcruisers include smaller elevators. (there are 3different versions) trim tab horns (2versions) aileron control arms (2versions). Also later kits are heavier than early ones for various reasons. All these factors affect and have changed the handling and therefore will slightly affect the ability to get in and out of various strips.
If you want chapter and verse on all the variations the best man to talk to is Graham Smith of Sprite Aviation Tel: 01304 827266, the original agent for the Sportcruiser. Graham knows more about the S/C than anyone on here and brought into the UK 70+kits over a two year period and virtually knows the spec of every kit in the UK.
There is no generic Sportcruiser in the UK and therefore no generic Sportcruiser performance either speed or handling. The are all slightly different due to factory mods or builder preferences.
Think about it this way, there is no generic PA28...An early PA28 140 has totally different performance and handling to a late version PA28-180 or whatever.