Forget Interframe, just take plain SVPflow code - the one I posted above - and add whatever you want/need.
In that case at least I'll be able to directly compare options in use.
If you want to do a fair comparison that is simple to reproduce and analyse, write two plain scripts, w/o any "interframe" or "FrameRateConverter" in use:
1. MSuper(...)
MAnalyse(...)
MRecalculate(...)
MSmoothFps(...)
2. SVSuper(...)
SVAnalyse(...)
SVSmoothFps(...)
Besides what's exactly the purpose of using those 20-yo-320x240-clips in the year 2017? it looks like shit in both cases...