How about Singer and Clydebank?
By train: 3 minutes to Dalmuir, plus 5 minutes minimum interchange time, plus another 3 minutes to the other station. Total = 11 minutes or so (assuming that there is already a train due to depart from Dalmuir)
By road transport: 1 or 2 minutes, due to both stations being sited along Kilbowie Road.
Another one here (and more or less on my doorstep) is Springburn to Ashfield. Although both stations are on opposite sides of the Edinburgh & Glasgow Railway, it is not possible to travel on a direct train between them without going via Glasgow Queen Street.
By train: Springburn - Glasgow QS = 12 minutes (via Bellgrove). 10 minutes minimum interchange time here before continuing on the 6 minute journey to Ashfield. Total = 28 minutes.
By road: 10 minutes approximately. From Springburn via Hawthorn Street to the old Possilpark bus garage, then right turn into Ashfield Street.