There is confusion! https://m.aircraftspruce.com/catalog/eppages/lordMount.php?clickkey=3028716

https://www.leadingedgeairfoils.com/lord-plate-mount-square.html
I heard the lord mounts are better, trust in the lord lol

I am familiar with the Barry mounts, George said the lord mounts made his rotax 277 vibrate less

I had a set of these (4) on my 582 power Kitfox and they did a great job.  LORD has more info on their website or you can talk with an application engineer.  Many options for damping (durometer, oil filled, springs and combinations thereof) to minimized the shock and vibration transmitted.   They would need to know frequencies, amplitudes and thrust loads to best optimize.  Might at least be worth getting a response curve for the mounts of interest to see over what range they perform best.

https://www.lord.com/industries/aerospace-and-defense/fixed-wing

When I was flying PPC's, they (Blue Heron) optimized a system using double isolation (a set of mounts on on the engine plate to a second engine plate (actually beams), and a set between the beams and the air frame.  Did an amazing job.  Wish I could still find the article on it.  It was in Ultralight Flying Magazine in the early 2000's and showed the development effort and reductions realized.

You can kinda see it here on my old machine:

[IMG]http://s733.photobucket.com/user/LSaupe/media/PPC/DSCN6155.jpg.html?sort=3&o=8[IMG][/URL]

[IMG]http://s733.photobucket.com/user/LSaupe/media/PPC/DSCN6154.jpg.html?sort=3&o=9[IMG][/URL]

I am confused on how the lord mounts work, looks like four outer mounting holes and one main center hole.

Yes, that is correct.  The center hole is bolted to your airframe, and the perimeter (outer 4) are bolted to the engine plate.  Relative motion is between the center hole and perimeter.   Your main clearance hole is diameter of the outer rubber circle if you will.

Here is a similar type of pic (replace the Rotax side mount bracket shown here with whatever bracket/plate you are using).  This particular install has a similar Lord mount (but with two holes vice 4) on the perimeter.  However, your first Lord link is the style you may be used to compared to the Barry mounts. (which is used my my PPC images)

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Thanks my friend, in your opinion should I use the Barry mounts or the lord mounts? Should I trust in the lord or trust in you?

Personal preference would be the Lord mount.  However, looking at the response curves and load capacity of both could help make up your mind.