On the short squatty 9.5 either of those oils will be fine. In fact, anything with a TCW3 will give you more protection than you need. Those are good engines, but I'm sure a bear to work on as most of the block is so low in the cowl it's practially in the lower unit.
Some 2 cycle oils have a hard time mixing with gas mixed with ethanol.
What happened that it was "redone". Sometimes that just means a carb rebuild, new fuel lines and a new impeller, and the original coils on those are very prone to failure. But if it had new rings... etc... that's pretty odd. They're pretty bulletproof engines. I guess with poor fuel they could carbon up the rings and lose compression. And of course there's always the risk of overheating.
Best of luck, I doubt you'll have much of an issue with this motor whatever oil you choose.