@Mannyrock, the TW is an oddball transformer and most do not consider it more powerful/desirable than the LW from an operational perspective as it is actually two small 60 Watt transformers in one. Someone at Lionel thought there was a market for this unique configuration for single train layouts with a considerable amount of accessories. The text of this document goes a little bit further into all of that: http://www.olsenstoy.com/cd/transfmr/pstw1.pdf
Bottom line, the maximum power available from a TW tap is 50% of its total capacity where the LW can deliver all of its capacity to a tap.
