The spark plugs neither know nor care if the spark is triggered by a mechanical switch (points) or an electronic one. You’ll feel no difference between properly maintained points and electronic. The reason why people claim that the electronic “runs better” is because usually they are replacing a worn original distributor with old, pitted points and a crappy original coil. Yeah, no wonder the electronic runs better.
I put a conversion kit in my 62 only because I’m lazy. I didn’t expect nor did I get any performance improvement. The 215 is a small block Buick. Any SBB electronic distributor bolts in.