Thats a Ran's Tizzard IMHO the only commercial delta every sold that could be considered on par with a average tadpole due to very low seat [ for a delta ] .
Not overly dissimilar to your top drawing. Could easily have the drive taken to the front via a pulley.
There is a video of 2 racing indoors around a industrial unit and one tips and dumps the driver , my Python with a similar seat height can raise 1 wheel at speeds under 8mph , this puzzled me for a while ? they have poor cornering ability compared to a tadpole ?
Well NO actually it is because they can turn so tightly almost in there own length , if a tadpole could do the same turns it would also be on 2 wheels.
Please do not open the can of worms labelled ' tadpoles are safer than deltas ' we are tired of eating worms !