If you want your two computers to be closer on NDL, run the Perdix with VPM-B (probably around +3). It won't be exact but at least it will reduce the discrepancy caused by a Haldane Model versus a Bubble model Anyway, you'll never have your two computers to match but the idea is to follow the first that reach the NDL.
The important point here is not to know which one will reach 0 first, but where is the whale shark
The important point here is not to know which one will reach 0 first, but where is the whale shark