I believe the abiotic theory was developed in the USSR during the Cold War. For some reason, the guy who developed it was politically connected, so it did get quite a lot of exposure - with "evidence" -within the scientific community there. May explain the reason for the large percentage difference.

I haven't seen much data on it.

Considering that this is the same culture that produced Lysenkoism, it may not be all that surprising

For some reason you seem to think that Lysenko's ideas are widely accepted in Russia today.