the forum's search engine doesn't do the best job of searching for filters by clone type, but using this modular grid & this article about filter clones, i came up with these 5 possible clones, not counting the studio electronics MS-20 boomstar which sounded really interesting and very different from their yamaha CS-80 which got me into it's sort of "nintendo/atari" sound
Intellijel - Korgasmatron II - seems to be the most popular as far as i can tell
https://www.modulargrid.net/e/intellijel-korgasmatron-ii
Befaco - Sallen Key Filter BF-22 - according to an online blurb i read, it is a "true clone", down to cloned ICs and can be used as a direct replacement
https://www.modulargrid.net/e/befaco-sallen-key-filter-bf-22
Analogue Solutions - SY02
https://www.modulargrid.net/e/analogue-solutions-sy02
Manhattan Analog - MA35 VCF/A - is actually an MS-10 clone... what's the difference between an MS-10 & MS-20?
https://www.modulargrid.net/e/manhattan-analog-ma35-vcf-a
Malekko Heavy Industry - Dual Borg - is technically supposed to be a bucchla clone, but is also compared to the MS-20
https://www.modulargrid.net/e/malekko-heavy-industry-dual-borg
anyone have any experience with any of these compared to any of the others? considering that at least as far as filter clones go, doepfer isn't the best choice (specifically their SEM clone), i'd expect there to be some sound quality differences between each brand, and something else i read implied that the MS-20 can do some huge bass sounds too which would be nice as i'm just not a fan of moog sound, but if 2 filters more or less sound the same, the one that offers extra tones, like a sweet overdrive, or multi-modes would be preferable. until hearing the MS-20 boomstar, i'd dismissed the synth as irrelevant.