Brand-to-brand size at a fixed US label — matched by foot length (cm), not guesswork.
Two charts · cm matchNike US 10 maps to about 27.1 cm on that brand’s chart. The nearest Salomon row at that length is US 10.5 / EU 44.5.
Same chart cm can still feel different on foot. Read the guides:
Nike: Air Force 1 '07 (runs big) · Dunk Low (true to size) · Pegasus 41 (true to size) · Vomero 5 (true to size) · Air Max 90 (true to size)
Salomon: XT-6 (runs small) · Speedcross 6 (runs small)