they're about the same
V3 Load Speed Tests: Let Us Know How We're Doing!
ok
in https://www.chess.com/news, it loaded more slow than https://www.chess.com/articles, and both http://www.chess.com/learn-how-to-play-chess and https://www.chess.com/play/apps were slower than the rest (the how to play chess was slower)
but again, they were all pretty much the same

Without going in to measuring specifics, I cannot tell the difference. But, the bigger problem for me is, as I am not used to using v3, I really cannot tell you whether or not this is good or not.
98% of the time, I am in v2. Still. I only go in to v3 to clear up a bunch of alerts I don't need to access or to see a message someone sent me from v3 (and v2 doesn't pick up who sent it).
Hi, v2 club!
We've been working on streamlining the code for many pages on Chess.com and have finished several pages. We'd like to get some feedback on loading speed for some of these pages.
Below is a list of pages that have been rewritten paired with a page that has not been rewritten. We'd like you to take a moment and load both pages and give your impression of how quickly they loaded.
Please make sure you are NOT in beta for this test. (You can check here: https://www.chess.com/settings/beta)
https://www.chess.com/article/view/how-many-moves-can-you-see-ahead (New Code)
vs
https://www.chess.com/news/view/the-unique-reason-the-broken-now-fixed-chess-com-app-made-headlines-6918 (Old Code)
https://www.chess.com/articles (New Code)
vs
https://www.chess.com/news (Old Code)
http://www.chess.com/learn-how-to-play-chess (New Code)
vs
https://www.chess.com/play/apps (Old Code)
Also, please let us know how http://www.chess.com/home (New Code) loads for you as well.
Thank you!