Having been on these trains IRL I knew they performed much better on AC power but actually driving them really put it into perspective. I had a run in off the rails mode from Paddington to Slough and the better acceleration was immediately noticeable. It wasn't long before I had reached it's top speed of 110mph, and leaving the power at notch 4 it maxed out at 122 by around Southall! I then brought it back down to coast at 110 to maintain a vague sense of realism. Coming into Slough the better braking was noticeable too, it feels much more responsive.