I have had both but I prefer the metric one. But not all the metric and inch models are the same.
I have had around 40 in the past 35 years, different stocks, sights, and barrel lengths meaning (with and without muzzle breaks).
Canadian C1s have a variety of wood stock lengths, some of the British L1A1s have wood stocks and some have synthetic stocks with different length butt pads. I haven't encountered metric models with different butt lengths. The differences in the metric guns tend to be the fore stocks, some are synthetic, others are metal like the G1, and some are a wood and metal combination like the Israeli FALs. Some of the FALs have flash hiders and some don't, the inch patterns all seem to have a flash hider.