Compare

import vapoursynth as vs
import btpfunc as btp
core = vs.get_core()
path1=r'C:/PATH/TO/sourceA.mkv'
clip1=core.ffms2.Source(path1)
clip1=btp.FFInfo(clip1, text='A', frame_num=True, frame_type=True, frame_time=True,color='0000FFFF')
path2=r'C:/PATH/TO/sourceB.mkv'
clip2=core.ffms2.Source(path2)
clip2=btp.FFInfo(clip2, text='B', frame_num=True, frame_type=True, frame_time=True,color='0000FFFF')
comp=core.std.Interleave([clip1,clip2])
comp.set_output()