winstrol is harsher than tbol and var i'd say... but unlike the other two, with winstrol you know what you get.
for some people tbol seems to trash lipids pretty bad, but ive not seen a lot of reports about that...
i'd say winstrol is probably the strongest out of these 3...
with anavar its not uncommon that people run 100mg or even more, whereas ive never seen anyone running 100mg winstrol a day, tbol maybe but usually its dosed between 50-80mg.
ive never seen anyone running more than 50mg winstrol actually.
but 100mg winstrol a day would probably make your snap your shit up just walking up a flight of stairs because it wrecks tendons and joints, so that might be another reason...