[StatPress] is this plugin reliable?

hey
im using statpress for a long time now, and also using statcounter.com free service statistics.
i get different results in each one, for example:
for the month of september, statcounter.com shows i had 73,666 page loads, while statpress shows 85,319.
and another example, for yesterday the 27 of october, statcounter.com shows i had 6,046 page loads and statpress shows i had 6,978.
in which should i use? who is more reliable and gives the right statistics?