The Russian guards at Poltava, 1/72 Strelets and Zvedza plastic:
The Preobrazhenski guards (the grenadier cap is indeed incorrect for Poltava, this one is from late 1709-1710):



The Semeonovski guards (I choose amongst the various sources that with red gaiters/socks)


More pictures of Streltsi and Grenadiers on my blog:
http://torgauproject.blogspot.itCheers,
Fabrizio