Tried ladder mode and it seems expert gives 500, playing with additional rounds gives +250 and playing with tag gives +250 and getting a flawless gives you +1000 on any difficulty. The last boss is hard, was only able to beat him using Cindel’s jumping projectiles on expert.
As for Tower, I found stage 101 mini game where you play as Mileena and Bakara stage too small you could hardly see which of the two characters ground or air are coming from the side. Also Mileena will miss if you use anti air not fast enough since its a jump and projectile instead of Bakara just using an uppercut from the ground sort of move for the mini game.
Overall, just post which characters and tactics you can beat ladder mode on in expert and which stages in tower mode are more annoying than the others or if you find them easy just give advice.