None of the side mount carbs present a problem on planes of a size the engine would normally be used in. The DL, simply put, is made in a country where the labor force is paid $0.40 to $0.70 per hour. Many of the factory employees live in the factory itself since they cannot afford to have a place of their own. What a deal, right? On top of that the vast majority of the metals used in the engines are produced in the same country for the same labor rates. Neither country has any rules or regulations regarding employee benefits, safety, or social welfare programs. Work for the offer or starve. remember that the DL was copied from another engine, and that the DL had the advantage of using someone elses work to build upon. Thus a few minor changes that make the difference is performance were quite easy to develop since so much information was already available to review.

Some of the higher priced engine's parts are made in the same country or one next door at a slightly higher labor rate, so a lot of the production costs are similar. As are parts for many various products and goods for many different companies. Everyone should be able to easily determine why the pricing between the two is significantly different.

The case and hub of a Taurus is made and machined in America. The piston, rod, and jugs are German. The crank is American made. The ignitions used are the American procuced version of the CH Syncro Spark, rather than the Chinese RC Xcell. Both are good units

The Brillelli starts out as an Echo engine, wherever they are made. All the modifications to turn them into a model friendly engine are performed in the U.S.A. Strong and reliable engines.

All of your choices are good ones. All you need to do is determine how much you want to spend, how much weight fits the application the best, and which ones you believe will hold the best value over the long term. Personally, I've never sold one of my gassers and I've only worn one engine out in R/C flying. That one was well used before I got it. For me the resale value has no meaning since I'll likely keep the engine as long as I keep flying.