Your confusion is easily cleared up. Forget the Toshiba. If your getting the IBM at good price take it. If you don't you will regret it. Take a toshiba and throw it down a flight of stairs. Then throw the IBM down there. You will have to send the toshiba for repair. The IBM will still be happy as Larry - No problem.
No other comp manufacturer can build a pc like IBM.
Read the reviews. The IBM may not be as flashy looking as the Tecra, but it doesn't need to be. The Thinkpad is a different breed of notebook - a Superior breed!