Michelin Pilot Sport 3 compared to ContiSportContact 5 in a Peugeot 207 RC (205/45/17 X/L 88W): Michelin, they're a no-brainier: the sidewalls are less flexible, thus they have WAY better steering. They are not worse ride though. Significantly longer time between changing them. The Contis have better lateral grip (dry and wet) but you can't use it due to BAAAD steering feel. The Michelins give a bit extra liveability in the rear (pretty good thing for my taste) feeling extra safe at the same time -at least in the Peugeot.
Drove my brother's mk6 GTi in Dunlops sportmaxx RT. Great tyre in wet and dry. (Tip: they are the lightest tyres in 225/40/18 by a margin). Don't know about their longevity yet, but I prefer changing a set every year and have grip than having no grip for a long time.
Bridgestone RE050A: Nasty tyres in the Peugeot (factory-fit) and the Golf (the same). Plenty of tread, no grip after 4 months (in the Peugeot) and 7 months (in the GTi). After that benchmark, they decided to be very "audible" in both cars. Maybe they are good in your countries, but in a sunshiny country with slippery I-want-to-be-called-tarmac...absolutely unsafe.
Tip for tyre usage: if you like spinning out of junctions or traffic lights, your tyres don't. Spinning develops hot points in the tread, but that's too bad in a rather cool tyre circumference (as in town). Those hot spots make the rubber stiffer and with way lower tolerance to grip. If you are doing that often enough the tyre will be left with plenty of tread and lousy grip.
I would definitely go to Michelin Super Sports next time in my new GTi (when it's delivered and wants a tyre change anyway!) but I have a nasty feeling that it's going to be after 5-10km if it's not fitted with Michelins or Donlops. Time will show!
Sorry for the looooong post. But I did write it down because that's what an enthusiast forum is about: telling every member any useful information gathered, so that we all have a rounder view for our beloved cars and our beloved hobby: Driving
