Generally I use statistics HotLog. Because it was the first counter that I started using.
Yandex metric in the code has curly braces that shitty effect on my CMS, which uses Smarty tags, so try not to use.
And so, because of SEO, some of the projects put to the maximum counters by tags
Often these counters allow you to participate in the ranking that gives an external link with a good TCI and PageRank.
In principle, everything is the same everywhere, the rest of the digital part.