Whoops Yes, it takes into account leakage when measuring germanium transistors, please check 1.12k datasheet
https://github.com/svn2github/transistortester/tree/master/Doku/tags/english/ttester_eng112k.pdf
ruffrecords
At least MK328 must measure JFETS, not so in detail as DCA75 but it it must identify them correctly. I saw jfets as a diode junction with fake J201s or SK170s when their gain is too low or possibly other reasons. BTW even mk328 with 1.12k doesn't show Vgs (off) though it must (see docs). Only Vg (on) shown.
Please note that every transistor tester from China with 1.12k must identify jfets. But stock firmware of T3-T4 as instance identify them as BJT.