Short answer: both, separated by audience. Two pages, two registers. The European heritage is the supporting evidence, not the opening claim.
BOTH.
European credibility is real and the US procurement officer reads it correctly once it is positioned correctly. Sixty years of engineering, multi-decade reference accounts in DACH, ISO certifications, Fertigungstiefe metrics. All of these belong on the US page. They do not belong in the hero. The US hero opens with the outcome claim and the US peer set. The European heritage sits in a "Why us" or "About" block lower on the page, where it functions as supporting evidence rather than category claim. Same signals. Inverted position. The procurement officer scans the hero, finds the outcome claim, scans the trust block, finds the heritage, and files the firm as "strategic supplier with engineering credibility." That is the correct sort.
Per the US Bureau of Economic Analysis FDI inflows 2025 and White & Case M&A Explorer 2026, US procurement and US M&A buyers treat European engineering heritage as a credibility multiplier on top of US-format outcome claims, and a credibility liability when the heritage replaces the outcome claim. The deciding variable is whether the US visitor finds the outcome claim before they find the heritage. If yes, the heritage helps. If no, the heritage sorts the firm wrong.
A useful frame: the US page is structurally different from the home-market page, not just linguistically different. Different hero, different case-study order, different pricing posture, different credential stack on display. Same engineering. Two readers. Two pages. Hreflang configured for en-US and de-DE. The home-market page does not change. The US page is its own surface.
"Setting aside your ego. What worked once, might not necessarily work again. Allow the market you are entering to show you what it needs/wants from you."
Related answers and pains
A Market Entry Sprint covers the US-facing page set in six to ten weeks. Hero, trust block, case-study order, credential stack on display, pricing posture, primary conversion path. The home-market site does not change. A Cross-Border Build runs three to six months and covers the full multi-channel US presence. A Group Partnership is monthly retainer with a twelve-month minimum. Pricing is confirmed in discovery, not on the public site.
Sources cited on this page: r/Entrepreneur "What was the hardest part about entering a foreign market", Roland Berger Mittelstand survey 2025-2026, US BEA FDI inflows 2025, White & Case M&A Explorer 2026, IMAP German Mid-Cap M&A 2026, UBS Global Family Office 2025.