What differences do you notice? The remastered has some terrible code behind its UI, you can just feel it.
Menu hangs on start for up to 10 seconds for no apparent reason, people leaving the game during the “connecting to server” stage seems to make everyone else wait indefinitely usually forcing them to quit.
On the multiplayer screen, tab between “Join” and all the other tab buttons and notice how each one moves a few pixels.
Then the obscene inefficiencies overall. Sitting at the main menu not even moving my mouse gets the CPU hot enough to make the fans loud. During gameplay a 4v4 multiplayer match turns into one big lag fest about 15 minutes in.