My experience shows that analog oscillators sound identical. Tempest has a filter with a sort of higher resolution - more agressive (a very little differences). MOD Matrix is almost the same (the differences are as follows) because: Mopho has: x2 SUB OSC, x4 LFO vs x1 SUB x2 LFO (TEMPEST)... But... Mopho has only x4 MOD vs x8 MOD where you can assign similar LFO to additional sources (depends on idea - creation). But mopho have also SEQ where you can assign any destination plus and there is (i hope) analog noise & input audio. Finaly these instruments sounds in many presets identically. I created this package only using analog waves. exception: DCO (green) noise in some presets. In my opinion Tetra, Mopho, Tempest, maybe even Prophet have the same analog OSCs & very similar filters, MOD, ENV, etc. all shapes of analog OSCs (RAW) sound exactly the same.