Realizing I might not understand ETFs as well as I thought

Hi everyone, I’ve been investing for a few years, but recently I had the uncomfortable realization that I might not actually understand what I’m doing. I’m hoping someone here can help clarify a few ETF basics. I’ve tried Googling and even asking ChatGPT, but after too many “Sorry, you're right. Let me reformulate”, I lost faith. * **1 -** I use justetf.com to compare ETFs. Let's say both ETFs, blue and orange, track the S&P500. Does justetf.com display the returns after all taxes/TER have been applied? Like if you invested 100 EUR in both ETFs at the same time, this is EXACTLY what you would have gained after 5 years? If that is the case, why should I care about TER or trying to read a KID? After 5 years, the blue ETF had +11% returns over the orange one, from my point of view, I couldn't care less if the blue one had a TER of 1% and the orange of 0.03%. What am I missing here? https://preview.redd.it/qcuvge35w3cg1.png?width=1254&format=png&auto=webp&s=bf5b531696ff779ea364cff92444fff5c5d33e0f * **2 -** Can someone explain, like I’m 5, how EUR-hedged ETFs differ from unhedged ones?Why do EUR-hedged ETFs show higher returns while tracking the same underlying stocks? And what happens if the EUR depreciates against the USD? * **3 -** I'm from Poland and I use xTB to buy ETFs. Why should I care if I invest in an ETF that has ISIN IE, FR, LU, or DE? * **4 -** From a European perspective, how could Trump’s proposed “Big Beautiful Bill” impact investments or ETFs? I appreciate your help and have a happy new year!