What explains the difference in the meter readings Liveinternet, top.mail.ru TNS

Different algorithms, different settings (lock) in visitors. For example, I don't use "standard" databases adblock, and cut down specific annoying me is — why interfere with the owner of the site is interesting to me to analyze statistics and/or to obtain advertising revenue for impressions and clicks (for Google release advertisements quite often I click with the very real commercial interest, such as advertising, hosting)

In addition to different algorithms, some of the counters can not corny always manage to boot.

visitors all three of these reasons I believe based on cookies.
different algorithms
the differences in the code
the order of placing the code on the page
various algorithms for filtering of hits,
clutter cook user in each domain (browsers have different indicators of the safety of the cook, and the size of the exhaust ...)
probably something else, it would be easier to say for example "patient"

adblock zhezh

Differences in the counting algorithm re-visits.

still affected by the volume of coverage while counting with one viewing

TNS believes only Russian users, if you're talking about their monthly report.