Michelin's are so much better than bridgestone's
The best tire combination would be a summer tire the Michelin PS2 and snow Pilot alpin pa3
Michelin spends the most money in R/D
Class-Leading All-Weather Performance2
MICHELIN Pilot Sport A/S Plus tires are the only UHP tires in the Michelin lineup to offer TriFusionâ„¢ Compound - three different compounds bonded together on the tread face for superior all-weather performance
Best-in-Class Wet Grip2
State-of-the-art directional tread pattern and wet-weather silica compound combine for extreme wet-weather control..
Best-in-Class Tread Life, Without Compromising Performance2
MICHELIN Pilot Sport A/S Plus tires are the first to make use of the enhanced MaxTouch Constructionâ„¢ - a tire design innovation that delivers dramatically improved tread life without sacrificing performance. MICHELIN Pilot Sport A/S Plus tires are backed by a 45,000-mile limited warranty.3
Michelin puts silica in the thread base of the tire and bridgestone does not(helps on wet weather condition).
Michelin and bridgestone have equal bead designs
Michelin has a more aggresive thread pattern then the bridgestone
Michelin has MaxTouch(max grip) and C3M(steel belt construction) and TriFusion(silica(wet), carbon black(dry)) and full depth sipes(consistent handling as the tire wears down) and variable contact patch(consistent handling as you go until a corner braking and then flooring it out of the corner) and the list goes on and on and on.
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Bridgeston has one thing uni-t which is o-bead and carbon black LOL LOL sorry I forgot HES (which means a dirrectional thread pattern and is michelin has a better one)
But I have some good news for you bridgestone has a Buy & Try 30 Day Guarantee I suggest you use it.
Also to make things clear I have sold both Michelin and bridgestone in my 7 year tire carrer and I have also been to both of there testing grounds. Michelin is the clear leader.