You'll find the Super Tigre 61 (ABC or Ringed) takes considerably longer to break in than OS.
You cannot use the same fuel between both engines and get the same tuning results.
Do not use the stock glow plug that comes with the Tigre. Break in the Tigre with at least
5 tanks if ABC, more if it's ringed, and ringed requires a far richer mixture with cool down periods between runs. Use FAI or 5% nitro content fuel. All my Tigres really woke up after the first gallon of fuel. This is the period when some give up. Follow the plan, you'll be delighted you tried one. For $10 more, I like the .75 engine more, personally.

I run all kinds of engines. It's just another part of a rewarding hobby to keep it interesting.