I have had both. We just moved from a home with Lifeproof LVP into a home with COREtec. Lifeproof feels really more comfortable to walk on. It has a more rubbery underlay and much more comfortable for standing for long periods of time. Going from laminate flooors, we immediately noticed the comfort and it never felt cold, like the laminate or COREtec. COREtec is much harder on the feet, but looks more realistic to hardwood flooring.

Did you end up installing the Wiltshire Oak?

NOTHING. Sigh. You have purchased a CoreTec product with a backing. That means you are done. You can purchase a CoreTec product WITHOUT the backing. That leaves you free to use 3mm cork underlayment. You are not allowed to work with underpad with 97% of all vinyl products. If you want insulation you need to work with a floor that allows it = LAMINATE. A HIGH END laminate ($5/sf) can handle 12mm cork underlay (1/2"). That is serious insulation! All for $1.49/sf. If you insist on the CoreTec Plus AND insulation then you MUST work with a rigid subfloor system like DriCore. It offers a floor raise of 3/4" (19mm) Then the thickness of the CoreTec 8.5mm. This will cause a 1" floor raise. Do you have the ceiling clearance for this? How about the stairs? Personally I would go with 6mm cork underlay (1/4") and a 12mm (1/2") European laminate (Lico, Kahrs, etc) and be done. If your basement has moisture issues (either from above or below...it doesn't matter) you will loose whatever floor you put down. That includes the CoreTec. Yah. No one tells a purchaser that is the cost of a 'little flood' in the basement.

Unfortunately thus far designer has been more focused on the looks of things and I get very little useful feedback when I ask "technical" questions so not holding my breath. Sounds like maybe you should consider another designer. I am really terrible about making choices for my home that bring to life the perfectly staged vision in my head.... I also almost immediately regret those choices. I'm building a new home and this time around I'm really trying to stay focused on the LIVABILITY of the house to hopefully make everyone, including myself, a little less crazy! Wishing you luck with your selections!