For what it's worth...
I have 2 sets of Ricta clouds in 56mm. One 78a regular, other 86a chrome core. The 78a's dont feel "mushy" to me, but definitely comfy. Really sticky, and work well cruising on crusty streets. Almost to the point where nothing on the street matters except massive craters. The 86a's seemed to be a lot harder than they actually were, and felt like a hard wheel under my feet but just not as jarring as a 99/101d spit. Not sure how much of a difference the chrome core vs regular core clouds have, but the 86a's stayed on my setup when I wanted to cruise and screw around. But the 78a was perfect for cruising EVERYWHERE.