Gary, IMO, Lionel did a better job compressing the large locomotives than most Railking stuff. I'm not commenting on the running qualities, but rather the appearance. My favorites of the MTH RK line were the Imperial models, still able to run on O31 track, but well detailed with a great appearance. The Bantam models were my least favorites, they usually looked "toy like". The Lionel Lionmaster models were compressed tastefully, and just looked better.
Yes, GRJ, I agree 100% in looks Lionel over MTH, On my previous 3 layered layout with 4% grades, and O-31 Realtrax curves, and Fastrack O-36 curves and Turnouts, I had better luck across the board with the MTH cars being more consistent not having derailment issues, still working on getting the under layout track wiring done. Hard for me getting down to the floor and getting back up, so I have to take advantage on a dry day outside to be able to do any wiring. This layout is much simpler, only 1 layer, no inclines, so I would imagine all brands I have should work better I hope plus this one is on casters so it can be moved to access all sides. Old layout unfortunately had to be torn down for room for a hospital bed by fellow train operators so I could come home from the hospital for medical issues almost 7 years ago. Lucky to be alive, I will be happy when I finish the conventional power wiring connections, power drops every 6 pieces of Fastrack and TVS Diodes at each power drops and Transformers outputs. Working on doing my Locomotives with TVS Diodes also.