The Capitol Limited's on time record is only a little better than the Lake Shore Limited's record. Both run the first part of their trips from the East Coast on CSX tracks, both then end up on Norfolk Southern tracks basically from Ohio west to Chicago.

Both freight Co's seem to contribute to making both trains late.

Either train is a decent choice for heading west to Chicago, but on both getting power at your seat will be largely hit or miss. If power is extremely important, then you may wish to consider getting a sleeper where you will have a power outlet in your room. Also note that meals are included in the price of the sleeper, so that does help to ofset the cost a bit.