So I did start a Muscovy game tonight.

Here are the stats with Novgorod included for comparison:
Novgorod, vanilla, sept. 5 beta, 10 years easy/normal then vh/normal
Code:
Year Sta Income CTax Manu No Prov BB Tech IN PE TE T% StaC MPp/support
1450 0 13.8 3.4 0.9 0 = 18.7d 57 0 12+ 0+ 0 = 12 1.5/38 1- 1- 2- 2 2.8 24 36 X 215 24/ 35
1505 +2 29.2 9.0 1.4 0 = 39.6d 173 0 28+ 0+ 0 = 28 14.0/39 2- 2- 2- 3 9.4 29 32 X 548 74/110
1553 +3 42.7 15.9 1.7 6.7 = 67.5d 253 1 37+ 0+ 0 = 37 15.8/43 2- 2- 2- 4 9.6 41 31 X 492 128/188
1600 +2 63.1 32.7 2.5 14.4 = 112.7d 401 1 58+ 8+ 0 = 66 17.5/44 3- 2- 2- 5 34.9 49 32 X 638 196/292
1650 +2 94.5 49.6 58.9 20.3 = 223.4d 480 0 75+10+ 0 = 85 10.6/46 6- 3- 5- 5 9.8 54 56 X 478 211/369
1700 +2 181.8 79.0 186.9 73.2 = 521.4d 595 25 102+10+ 0 = 112 1.9/48 10- 4- 8- 5 21.4 52 107 X 1384 211/434
Muscovy, vanilla, sept. 5 beta, vh/normal
Code:
Year Sta Income CTax Manu No Prov BB Tech IN PE TE T% StaC MPp/support
1450 +2 17.0 2.9 0.6 5.6 = 26.1d 97 0 13+ 1+ 0 = 14 12.4/37 1- 1- 2- 2 0.2 18 30 X 153 61/ 78
1500 +2 30.2 12.6 8.1 5.6 = 56.6d 144 4 25+ 0+ 0 = 25 13.1/42 2- 2- 3- 3 4.8 44 47 X 661 58/117
1550 +2 46.8 21.6 24.5 8.9 = 101.7d 236 4 31+ 0+ 0 = 31 12.1/45 3- 2- 4- 5 6.5 55 52 X 889 92/164
1600 -1 74.7 32.6 74.5 19.7 = 201.3d 300 4 57+14+ 0 = 71 17.9/44 11- 3- 7- 5 13.7 41 66 X 724 116/226
1650 +3 157.9 65.0 175.5 74.8 = 473.7d 545 4 100+ 7+ 0 = 107 21.9/46 16-11- 8- 6 0.9 54 85 X 874 124/294
1700 +3 337.8 152.4 534.1 105.2 =1130.1d 909 42 171+ 8+ 0 = 179 32.1/53 18-12- 8- 7 19.3 60 127 X 2661 154/461
1450: The 12 BB mostly come from forceannexing Novgorod and taking Tambow, Ufa and Samara in an offensive war against the Golden Horde (which went with 'Buy the Non-Mongols off', less defections

).
1500: Forcevassalized Lithuania in 1456 and diploannexed in 1495 after researching trade 3. Released them again as their 4 minimum provinces were all catholic. Minted 4000 ducats in the 60s to build 4 refineries. Castile chose not to become Spain!
Political map (that's Hungary in Kleves and Gelre)
1550: Two short wars against Teutonic Order/Sweden for Tver, Pskov, Polotsk and against Golden Horde for Bogutjar and Astrakhan. I've got governors everywhere, trade 5 should be done in 1552. I'm close to 100 years more advanced in tech compared to my Novgorod game.
Political Map Austria has 43/45 BB ...
1600: Several quick offensive wars against Golden Horde and Sibir once I reached landtech 9 in 1603 (77 years earlier than with Novgorod

) and a couple of defensive wars against Ottomans, Austria, Sweden, and Poland which basically resulted in either white peaces or me giving a few ducats away. I may not be that far behind militarily, but I don't care for their provinces right now and any vassalization efforts would cost waaay too much.
I have a trade agreement with Portugal and France. My manpower is a lot lower this time as I'm at land 2 instead of 10.
Political map
1650: I get 7.4 colonists per year so colonizing Siberia continues at quite a pace. I annexed the Aztecs and took Bujak, Moldovia, Wallachia, Serbia, Bulgaria, Macedonia, and Hellas from Austria in several defensive wars with me being one CRT behind. I DoW the Ottomans, they had to give me Daghestan and Armenia. I also finally remembered to vassalize Ryazan.

o I think I'll start minting for some refineries. Two months per stab point and I don't have a single FAA.
Political map
1700: There isn't an orthodox province left that doesn't belong to Russia. Yay!

I annexed several pagans in West Africa and North America, took Sochi and Morea from Genoa; Corfu, Crete, Ionia, and Cyprus from France; Georgia, Trabzon, Dobrudja and Rumelia from Ottomans and I annexed Ryazan and Ethiopia. I build 36 refineries (3 had burned down before, I didn't notice really so I'm not sure how to correct the stats above), 4 FAAs were built by Ethiopia and two I got per event.
There are 14 countries left in Europe and Austria has vassalized tiny Palatinat and is in an alliance ...
Zimbabwe, Dakota, Navaho, Huron, Iroquois, Lenape, and Incas are the remaining pagans.
Slider settings:
aristocracy = 9
centralization = 10
innovative = 0
mercantilism = 2
offensive = 8
land = 0
quality = 10
serfdom = 10
Political map of North America
Political map of Africa
Political map of Europe
Political map of Siberia
What I find interesting is that for the first 180 years my income with Muscovy was 150% compared to Novgorod, while in the 100 years since then Muscovy's income was about twice that of Novgorod.
I guess the high inflation I had with Novgorod meant that I was unable to keep up with the growth levels I managed with Muscovy.
The difference was especially stark militarily, while I was protected by my alliance with Austria in my Novgorod game I have been fighting wars every couple of years against both France and Austria successfully in the Muscovy game.
Especially trade income is very different despite the similar levels of trade tech in 1700, Novgorod was embargoed by everyone in Europe and had to rely on trade in Asia, while Muscovy had a TA with Portugal and France and I was able to wage wars against Denmark and OE to open their CoTs again.
In the end I think Novgorod went wrong very early. I focused west which required lots of resources for not much gain that can be better spent in the east. Of course Muscovy also has lots of leaders with siege boni in the 15th century making winter warfare much less costly.