[sdiy] saw to tri/sine options

[Scott]

I'm trying to pick out a saw to tri/sine converter for a VCO I'm building (j.h.living).  Is there much difference between the various types?  Looking through my bookmarks I see a few..

Bergfotron uses transistors
http://hem.bredband.net/bersyn/VCO/Saw%20to%20tri-sin%20W.gif

ASM uses diodes
http://www.elby-designs.com/asm-2/vco/vco1-shaper-asm2-cct.pdf

rwilson uses a 13700 (nothing direct, but it's on the VCO schematic)
http://www.musicfromouterspace.com/analogsynth/VCO200604REV01/vcoschematicpage2.gif

Thanks!