Characteristics? I want hard specifications. Not some marketing mumbo jumbo.
There is hardly an iota of specifications. Doesn't even tell you how heavy the piston is for gods sake.
I've had 3 motors (2 26's, one 25) with the apparently inferior pistons - Not one has made any noise on start up.
All motors have made 350rwkw+ without a problem, 15,000-20,000kms and compression is fine. Good enough for me, and good enough for the vast majority of users here and around the world.
My budgets generally are not tight, I just refuse to waste money on exotic brand name Jap stuff that offers no discernible advantage over another product local or US etc other than to lighten my wallet unnecessarily.