They like to cut corners- look at the fiasco that was the Delhi Metro's Airport line- shoddy maintenence, loss making and reduced speed of the trains- the DMRC had to step in and take ownership of the line and now speeds of the trains has increased to near full speed, ridership is up and the line if profit making! Simiarly look at how cheap the Mumbai metro looks and comapre it to L&T built Hydrabad metro or the Delhi Metro (much of it has been built by L&T)- there just is no comparison.
L&T can be trusted more than Reliance to deliver on quality, on time and on budget.
Is it the same Ambani brother?