The bearings in the Tigre certainly cost the Chinese a bit more to produce that engine, but there really isn't much more worth in them.

Back in the day, OS made an excellent 35S for CL stunt. It was an excellent engine. I've still got every one of them I ever bought. And I flew the devil out of them. And they've got plain bearings in them. I usually wore out the piston/sleeve/wristpin/conrod's about twice before the nose ever showed any blowout fuel.

Don't make your decision based on the bearings.