For the period of active Russian involvement in the Napoleonic Wars (1805-1815) the Model 1803 Standard had replaced the Model 1800 for almost all units except the Guard.  The three regiments in original guard status at the time of the Model 1800 issue,   Preobrazhenski, Semionovski and Ismailovski, retained these standards issued them by Tsar Paul until their replacement by the Model 1814's by Tsar Alexander.  There were, as with line infantry, two types of Standards issued per regiment one white and the remaining five "colored". 

Note: While the "white" standards in these images may show a line at the meeting point of the cross and corners. In reality the standards were sewn together in sections and on an actual  "white standard" the joint lines of white colored sections would be essentially invisible at any appreciable distance.

Preobrazhenski; Semionovski; Ismailovski Model 1800 "white" standard

Preobrazhenski; Semionovski; Ismailovski Model 1800 colored standard

Both standards had the central round orange disk with the Romanov two headed eagle in black with gold crowns, beaks and claws. The eagles hold a package of red thunderbolts and gold lightning streaks. Inside the disk is a blue ribbon inscribed on one side "God with us" and on the obverse "God's Blessing" in Cyrillic.   The disk is surrounded by a gold wreath, topped by a gold crown and tied at the bottom with a blue ribbon. There are smaller wreaths, crowns, and the Cyrillic cypher for "P" (for Pavel or 'Paul') all in gold in each of the four corners.

The white standards dual crosses were all white, with the right hand corners red over white, and left hand side white over red.  The colored standards had the main "cross" in red, with a thinner white cross superimposed over the top.

Of the units entering the Guard after the 1800 issue the Pavlovski and Lieb-Grenadiers retained the Model 1803 Standards for the St. Petersburg Inspection that they had used as line regiments. 

The Pavlovski grenadier regiment also continued to wear their famed grenadiers brass Mitre hats.  These they retained, even after the rest of the Russian armies grenadier units had switched to the shako style head gear.  All other grenadier units wore shakos, but  with a plume to distinguish them from line units.

As late as 1917 they reportedly still wore the Mitre at dress or parade occasions, many with the bullet holes from Eylau and Friedland, inscribed with the name of the original owner. Supposedly when new members entered the unit they were presented the Mitre in a very grave and solemn ceremony.  As the Soviet military used similar ceremonies albeit with different "icons" I find the tale convincing.  It has also been said the Russians never throw anything away, and I believe it. We may see these mitres again under the Russian Republic.