EuroLeague vs NBA shot difficulty

Are EuroLeague shots harder than NBA shots?

This site cannot answer that, and the reason is worth stating rather than hiding. The expected-points model is fit separately for each league and anchored to each season's own league rate, so a figure means "against this league, this season" and nothing more. Comparing the raw numbers across leagues compares two different yardsticks.

Side by side

EuroLeague vs NBA shot difficulty: what each measures
Median expected points per shotMedian expected FG%Median FG%League free throws / 100
LeagueMedian expected points per shotMedian expected FG%Median FG%League free throws / 100
NBA1.24746.0%46.3%18.4
EuroLeague1.31546.2%46.7%24.0
EuroCup1.30444.8%46.2%25.8
Liga ACB1.32744.9%46.1%25.4
Lega Basket Serie A1.28444.8%44.9%24.6
Basketball Bundesliga1.28144.5%44.6%27.6
Greek Basket League1.30045.9%47.0%25.4
ABA Liga1.31145.3%45.9%27.1
WNBA1.21143.3%42.6%22.5

Current season per league. Shown because the figures are real and often asked for, NOT because they are comparable: each column comes from a model fit on that league alone.

Which should you use?

Use them within a league. To compare leagues you would need one model fit across all of them on a shared feature set, which the differing public feeds do not currently support.

What neither measures

No number here supports a claim that one league's shots are harder than another's.

Definitions: Expected points per shot.

Over Expected is a basketball shot-value platform covering NBA, EuroLeague, EuroCup, Liga ACB, Lega Basket Serie A, Basketball Bundesliga, Greek Basket League, ABA Liga, WNBA.