Don't they all claim top of the line these days?
I have a BLI and a few Bowser loco's but unfortunately have not done anything with them (as I wait to find a good paint stripper for them) so I can't give advice on how well they go
I don't own any Atlas, Kato or Genesis.
Most loco's would be a hit and miss; very few importers (note, they are rarely manufacturer's these days) have much if any idea of mechanical engineering and know how to design a good drive train, they rely a lot on the manufacturers to know what they are doing in that department,
sometimes with disastrous consequences.
- Tim