Both cars were hooned to the limit and beyond, to me.
2 secs is an age on a track like that, just shows how competent the Megane actually is. Never driven a Megane, but if it's anywhere near as much fun as a Clio then I can see why people would buy one over a 370. £10k less, quicker in all conditions, cracking chassis, more practical... Unless you really want the V6 noise, why get a 370?
But yes, I'd always choose an average RWD car over a good FWD car too. I prefer my driven wheels at the rear, more fun to play with.